Functions host is crashing when AzureWebJobsDashboard app setting is set

`System.FormatException : No valid combination of account information found.
at Microsoft.WindowsAzure.Storage.CloudStorageAccount.<>c.b__97_0(String err)
at Microsoft.WindowsAzure.Storage.CloudStorageAccount.ParseImpl(String connectionString,CloudStorageAccount& accountInformation,Action1 error)
at Microsoft.WindowsAzure.Storage.CloudStorageAccount.Parse(String connectionString)
at Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.FunctionInstanceLogger..ctor(IFunctionMetadataManager metadataManager,IProxyMetadataManager proxyMetadataManager,IMetricsLogger metrics,IHostIdProvider hostIdProvider,IConfiguration configuration,ILoggerFactory loggerFactory) at /azure-functions-host-b9807ebab1b8084dd0aae8b8d20953c6f2bf6972/src/WebJobs.Script.WebHost/Diagnostics/FunctionInstanceLogger.cs : 57
at Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.FunctionInstanceLogCollectorProvider.Create() at /azure-functions-host-b9807ebab1b8084dd0aae8b8d20953c6f2bf6972/src/WebJobs.Script.WebHost/Diagnostics/FunctionInstanceLogCollectorProvider.cs : 35
`

Start at src/WebJobs.Script.WebHost/Diagnostics/FunctionInstanceLogger.cs line 57 and the collector creation path at line 35. Reproduce the crash with the AzureWebJobsDashboard app setting enabled, then trace the connection-string parsing failure. Done means the functions host starts without this exception when that setting is present.

Written by the indexing model from the issue text.