AzureRM.OperationalInsights: Not supporting Kusto Query Language

### Cmdlet(s)
```
Get-AzureRmOperationalInsightsSearchResults
Get-AzureRmOperationalInsightsSavedSearch
```

### PowerShell Version
```
Name Value
---- -----
PSVersion 5.1.15063.502
PSEdition Desktop
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
BuildVersion 10.0.15063.502
CLRVersion 4.0.30319.42000
WSManStackVersion 3.0
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
```

### Module Version
```
ModuleType Version Name
---------- ------- ----
Script 3.3.1 AzureRM.OperationalInsights
```

### OS Version
`BuildVersion 10.0.15063.502`

### Description
Both _Get-AzureRmOperationalInsightsSearchResults_ and _Get-AzureRmOperationalInsightsSavedSearch_ doesn't support the Kusto query language, even though the OMS/Log Analytics workspace has been upgraded.

I run the following command to pull data from a upgraded OMS workspace:
```
$queryKusto = "search Type == ""Heartbeat"""
Get-AzureRmOperationalInsightsSearchResults -ResourceGroupName "resourcegroup" -WorkspaceName "workspace" -Query $queryKusto
```

I receive this message:
```
Id :
Metadata : Microsoft.Azure.Commands.OperationalInsights.Models.PSSearchMetadata
Error : Microsoft.Azure.Commands.OperationalInsights.Models.PSSearchError
Value :
```

If I run the same cmdlet with the native query.
```
$queryNative = "Type=Heartbeat"
Get-AzureRmOperationalInsightsSearchResults -ResourceGroupName "resourcegroup" -WorkspaceName "workspace" -Query $queryNative
```

I get this result:
```
Id : subscriptions/e4de540c-9bb9-49ab-8e32-XXXXXXXXXXXX/resourceGroups/workspacename_rg/providers/Microsoft.Operationa
lInsights/workspaces/workspacename/search/80f791c2-4004-4a1f-80f9-XXXXXXXXXXXX|Shim
Metadata : Microsoft.Azure.Commands.OperationalInsights.Models.PSSearchMetadata
Error :
Value : {"TenantId": "214fc5a7-9a4e-4818-a600-XXXXXXXXXXXX" "SourceSystem": "OpsManager" "TimeGenerated":
"2017-09-05T06:47:34.72Z" "MG": "00000000-0000-0000-0000-000000000001" "ManagementGroupName":
"AOI-214fc5a7-9a4e-4818-a600-XXXXXXXXXXXX" "SourceComputerId": "d1e35af7-cb7b-4325-8f52-XXXXXXXXXXXX"
"ComputerIP": "13.93.5.48" "Computer": "workspacename-vm1" "Category": "Direct Agent" "OSType": "Windows"
"OSMajorVersion": "10" "OSMinorVersion": "0" "Version": "8.0.11049.0" "SCAgentChannel": "Direct"
"IsGatewayInstalled": false "RemoteIPLongitude": 4.94 "RemoteIPLatitude": 52.31 "RemoteIPCountry":
"Netherlands" "SubscriptionId": "e4de540c-9bb9-49ab-8e32-XXXXXXXXXXXX" "ResourceGroup": "workspacename_rg"
"ResourceProvider": "Microsoft.Compute" "Resource": "workspacename-vm1" "ResourceId": "/subscriptions/e4de540c-9b
b9-49ab-8e32-XXXXXXXXXXXX/resourceGroups/workspacename_rg/providers/Microsoft.Compute/virtualMachines/workspacename-vm
1" "ResourceType": "virtualMachines" "ComputerEnvironment": "Azure" "Solutions": "\"updates\",
\"changeTracking\", \"networkMonitoring\", \"serviceMap\", \"wireData2\"" "Type": "Heartbeat" "id":
"773fe1ca-5ce0-4672-b623-XXXXXXXXXXXX" "__metadata": {
"Type": "Heartbeat",
"TimeGenerated": "2017-09-05T06:47:34.72Z"
}, "TenantId": "214fc5a7-9a4e-4818-a600-XXXXXXXXXXXX" "SourceSystem": "OpsManager" "TimeGenerated":
"2017-09-05T06:46:34.72Z" "MG": "00000000-0000-0000-0000-000000000001" "ManagementGroupName":
"AOI-214fc5a7-9a4e-4818-a600-XXXXXXXXXXXX" "SourceComputerId": "d1e35af7-cb7b-4325-8f52-XXXXXXXXXXXX"
"ComputerIP": "13.93.5.48" "Computer": "workspacename-vm1" "Category": "Direct Agent" "OSType": "Windows"
"OSMajorVersion": "10" "OSMinorVersion": "0" "Version": "8.0.11049.0" "SCAgentChannel": "Direct"
"IsGatewayInstalled": false "RemoteIPLongitude": 4.94 "RemoteIPLatitude": 52.31 "RemoteIPCountry":
"Netherlands" "SubscriptionId": "e4de540c-9bb9-49ab-8e32-XXXXXXXXXXXX" "ResourceGroup": "workspacename_rg"
"ResourceProvider": "Microsoft.Compute" "Resource": "workspacename-vm1" "ResourceId": "/subscriptions/e4de540c-9b
b9-49ab-8e32-XXXXXXXXXXXX/resourceGroups/workspacename_rg/providers/Microsoft.Compute/virtualMachines/workspacename-vm
1" "ResourceType": "virtualMachines" "ComputerEnvironment": "Azure" "Solutions": "\"updates\",
\"changeTracking\", \"networkMonitoring\", \"serviceMap\", \"wireData2\"" "Type": "Heartbeat" "id":
"0a163761-9c0f-4307-9da9-XXXXXXXXXXXX" "__metadata": {
"Type": "Heartbeat",
"TimeGenerated": "2017-09-05T06:46:34.72Z"
}, "TenantId": "214fc5a7-9a4e-4818-a600-XXXXXXXXXXXX" "SourceSystem": "OpsManager" "TimeGenerated":
"2017-09-05T06:45:34.677Z" "MG": "00000000-0000-0000-0000-000000000001" "ManagementGroupName":
"AOI-214fc5a7-9a4e-4818-a600-XXXXXXXXXXXX" "SourceComputerId": "d1e35af7-cb7b-4325-8f52-XXXXXXXXXXXX"
"ComputerIP": "13.93.5.48" "Computer": "workspacename-vm1" "Category": "Direct Agent" "OSType": "Windows"
"OSMajorVersion": "10" "OSMinorVersion": "0" "Version": "8.0.11049.0" "SCAgentChannel": "Direct"
"IsGatewayInstalled": false "RemoteIPLongitude": 4.94 "RemoteIPLatitude": 52.31 "RemoteIPCountry":
"Netherlands" "SubscriptionId": "e4de540c-9bb9-49ab-8e32-XXXXXXXXXXXX" "ResourceGroup": "workspacename_rg"
"ResourceProvider": "Microsoft.Compute" "Resource": "workspacename-vm1" "ResourceId": "/subscriptions/e4de540c-9b
b9-49ab-8e32-XXXXXXXXXXXX/resourceGroups/workspacename_rg/providers/Microsoft.Compute/virtualMachines/workspacename-vm
1" "ResourceType": "virtualMachines" "ComputerEnvironment": "Azure" "Solutions": "\"updates\",
\"changeTracking\", \"networkMonitoring\", \"serviceMap\", \"wireData2\"" "Type": "Heartbeat" "id":
"2e4c5608-0b24-4a0f-b4e9-XXXXXXXXXXXX" "__metadata": {
"Type": "Heartbeat",
"TimeGenerated": "2017-09-05T06:45:34.677Z"
}, "TenantId": "214fc5a7-9a4e-4818-a600-XXXXXXXXXXXX" "SourceSystem": "OpsManager" "TimeGenerated":
"2017-09-04T10:45:50.147Z" "MG": "00000000-0000-0000-0000-000000000001" "ManagementGroupName":
"AOI-214fc5a7-9a4e-4818-a600-XXXXXXXXXXXX" "SourceComputerId": "d1e35af7-cb7b-4325-8f52-XXXXXXXXXXXX"
"ComputerIP": "52.178.113.62" "Computer": "workspacename-vm1" "Category": "Direct Agent" "OSType": "Windows"
"OSMajorVersion": "10" "OSMinorVersion": "0" "Version": "8.0.11049.0" "SCAgentChannel": "Direct"
"IsGatewayInstalled": false "RemoteIPLongitude": 4.94 "RemoteIPLatitude": 52.31 "RemoteIPCountry":
"Netherlands" "SubscriptionId": "e4de540c-9bb9-49ab-8e32-XXXXXXXXXXXX" "ResourceGroup": "workspacename_rg"
"ResourceProvider": "Microsoft.Compute" "Resource": "workspacename-vm1" "ResourceId": "/subscriptions/e4de540c-9b
b9-49ab-8e32-XXXXXXXXXXXX/resourceGroups/workspacename_rg/providers/Microsoft.Compute/virtualMachines/workspacename-vm
1" "ResourceType": "virtualMachines" "ComputerEnvironment": "Azure" "Solutions": "\"updates\",
\"changeTracking\", \"networkMonitoring\", \"serviceMap\", \"wireData2\"" "Type": "Heartbeat" "id":
"a7242335-926e-4116-99ab-XXXXXXXXXXXX" "__metadata": {
"Type": "Heartbeat",
"TimeGenerated": "2017-09-04T10:45:50.147Z"
}...}

```
### Debug Output
```
DEBUG: 08:55:44 - GetAzureOperationalInsightsSearchResultsCommand begin processing with ParameterSet
'__AllParameterSets'.
DEBUG: 08:55:44 - using account id 'user@tenant.onmicrosoft.com'...
DEBUG: [Common.Authentication]: Authenticating using Account: 'user@tenant.onmicrosoft.com', environment:
'AzureCloud', tenant: '910ae351-0839-4d63-a3ef-XXXXXXXXXXXX'
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: aeccb7e5-7f46-46bd-afa2-XXXXXXXXXXXX - AcquireTokenHandlerBase: === Token Acquisition
started:
Authority: https://login.microsoftonline.com/910ae351-0839-4d63-a3ef-XXXXXXXXXXXX/
Resource: https://management.core.windows.net/
ClientId: 1950a258-227b-4e31-a9cf-XXXXXXXXXXXX
CacheType: Microsoft.Azure.Commands.Common.Authentication.ProtectedFileTokenCache (2 items)
Authentication Target: User

DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: - TokenCache: Deserialized 2 items to token cache.
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Verbose: 1 :
DEBUG: 09/05/2017 06:55:44: aeccb7e5-7f46-46bd-afa2-XXXXXXXXXXXX - TokenCache: Looking up cache for a token...
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: aeccb7e5-7f46-46bd-afa2-XXXXXXXXXXXX - TokenCache: An item matching the requested resource
was found in the cache
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Verbose: 1 :
DEBUG: 09/05/2017 06:55:44: aeccb7e5-7f46-46bd-afa2-XXXXXXXXXXXX - TokenCache: 46.178268625 minutes left until token in
cache expires
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: aeccb7e5-7f46-46bd-afa2-XXXXXXXXXXXX - TokenCache: A matching item (access token or refresh
token or both) was found in the cache
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: aeccb7e5-7f46-46bd-afa2-XXXXXXXXXXXX - AcquireTokenHandlerBase: === Token Acquisition
finished successfully. An access token was retuned:
Access Token Hash: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Refresh Token Hash: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Expiration Time: 09/05/2017 07:41:55 +00:00
User Hash: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: 32605171-b015-44d4-a261-XXXXXXXXXXXX - AcquireTokenHandlerBase: === Token Acquisition
started:
Authority: https://login.microsoftonline.com/910ae351-0839-4d63-a3ef-XXXXXXXXXXXX/
Resource: https://management.core.windows.net/
ClientId: 1950a258-227b-4e31-a9cf-XXXXXXXXXXXX
CacheType: Microsoft.Azure.Commands.Common.Authentication.ProtectedFileTokenCache (2 items)
Authentication Target: User

DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: - TokenCache: Deserialized 2 items to token cache.
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Verbose: 1 :
DEBUG: 09/05/2017 06:55:44: 32605171-b015-44d4-a261-XXXXXXXXXXXX - TokenCache: Looking up cache for a token...
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: 32605171-b015-44d4-a261-XXXXXXXXXXXX - TokenCache: An item matching the requested resource
was found in the cache
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Verbose: 1 :
DEBUG: 09/05/2017 06:55:44: 32605171-b015-44d4-a261-XXXXXXXXXXXX - TokenCache: 46.1781018916667 minutes left until
token in cache expires
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: 32605171-b015-44d4-a261-XXXXXXXXXXXX - TokenCache: A matching item (access token or refresh
token or both) was found in the cache
DEBUG: Microsoft.IdentityModel.Clients.ActiveDirectory Information: 2 :
DEBUG: 09/05/2017 06:55:44: 32605171-b015-44d4-a261-XXXXXXXXXXXX - AcquireTokenHandlerBase: === Token Acquisition
finished successfully. An access token was retuned:
Access Token Hash: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Refresh Token Hash: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Expiration Time: 09/05/2017 07:41:55 +00:00
User Hash: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

DEBUG: ============================ HTTP REQUEST ============================

HTTP Method:
POST

Absolute Uri:
https://management.azure.com/subscriptions/e4de540c-9bb9-49ab-8e32-XXXXXXXXXXXX/resourcegroups/workspacename_rg/providers/Mi
crosoft.OperationalInsights/workspaces/workspacename/search?api-version=2015-03-20

Headers:
x-ms-client-request-id : 277cefa1-c216-4c67-b043-XXXXXXXXXXXX
accept-language : en-US

Body:
{
"top": 10,
"highlight": {},
"query": "search Type == \"Heartbeat\"",
"end": "2017-09-05T06:55:44.5898809Z"
}

DEBUG: ============================ HTTP RESPONSE ============================

Status Code:
OK

Headers:
Pragma : no-cache
X-RateLimit-Remaining : 99
X-RateLimit-Limit : 100
Strict-Transport-Security : max-age=31536000; includeSubDomains
X-Content-Type-Options : nosniff
x-ms-ratelimit-remaining-subscription-resource-requests: 149999
x-ms-request-id : da105eae-57eb-477e-b8c2-XXXXXXXXXXXX
x-ms-correlation-request-id : da105eae-57eb-477e-b8c2-XXXXXXXXXXXX
x-ms-routing-request-id : WESTEUROPE:20170905T065545Z:da105eae-57eb-477e-b8c2-XXXXXXXXXXXX
Cache-Control : no-cache
Date : Tue, 05 Sep 2017 06:55:44 GMT
Server : Microsoft-IIS/8.5
X-Powered-By : ASP.NET

Body:
{
"__metadata": {
"resultType": "error"
},
"error": {
"type": "QuerySyntax",
"message": "Invalid syntax.",
"line": 1,
"column": 13,
"text": "="
}
}
```

### Script/Steps for Reproduction
```
$queryKusto = "search Type == ""Heartbeat"""
Get-AzureRmOperationalInsightsSearchResults -ResourceGroupName "resourcegroup" -WorkspaceName "workspace" -Query $queryKusto
```