Fixing the names for Operational Insights cmdlets

IMO, it would make sense to create aliases that will use "LogAnalytics" instead of "OperationalInsights".

"IntelligentPack" should be also changed to "Solution". For example:

``` powershell
Set-AzureRmOperationalInsightsIntelligencePack > Set-AzureRmLogAnalyticsSolution
Get-AzureRmOperationalInsightsIntelligencePacks > Get-AzureRmLogAnalyticsSolution
```

Also, there is a bunch of wrongly named cmdlets that use a plural nouns instead of singular nouns:

``` powershell
Get-AzureRmOperationalInsightsIntelligencePacks
Get-AzureRmOperationalInsightsLinkTargets
Get-AzureRmOperationalInsightsSavedSearchResults
Get-AzureRmOperationalInsightsSearchResults
Get-AzureRmOperationalInsightsWorkspaceManagementGroups
Get-AzureRmOperationalInsightsWorkspaceSharedKeys
```