Implement fix to Suppress Warning Messages regarding AzureRM modules

SimpleAzureVMStartStop.ps1

@@ -70,6 +70,13 @@ param(
 
 Write-Output "Script started at $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss')"
 
+# temporarily hide Warning message (see Issue #2 in Github)
+$WarningPreference = "SilentlyContinue"
+# explicitly load the required PowerShell Az modules
+Import-Module Az.Accounts,Az.Compute
+# re-set WarningPreference to show Warning Messages
+$WarningPreference = "Continue"
+
 $errorCount = 0
 
 # connect to Azure, suppress output
@@ -179,4 +186,4 @@ $endOfScriptText = "Script ended at $(Get-Date -Format 'yyyy-MM-dd HH:mm:ss')"
 if ($errorCount -gt 0) {
     throw "Errors occured: $errorCount `r`n$endofScriptText"
 }
-Write-Output $endOfScriptText
+Write-Output $endOfScriptText