Added failure retry when error occurs during connecting az account

Author: vidai-msft

.azure-pipelines/util/live-test-steps.yml

@@ -85,6 +85,8 @@ jobs:
       targetType: filePath
       filePath: ./tools/TestFx/Live/InvokeLiveTestCITask.ps1
       arguments: -UseWindowsPowerShell ('${{ parameters.psVersion }}' -eq '5.1') -ScriptFile './tools/TestFx/Live/ConnectLiveTestServicePrincipal.ps1 $(LiveTestServicePrincipalSubscriptionId) $(LiveTestServicePrincipalTenantId) $(LiveTestServicePrincipalId) $(LiveTestServicePrincipalSecret)'
+    failOnStderr: true
+    retryCountOnTaskFailure: 3
 
   - task: PowerShell@2
     displayName: Run top E2E live scenarios
@@ -97,12 +99,13 @@ jobs:
   - task: PowerShell@2
     displayName: Save live test results to Kusto
     condition: succeededOrFailed()
-    retryCountOnTaskFailure: 3
     inputs:
       pwsh: true
       targetType: filePath
       filePath: ./tools/TestFx/Live/SaveLiveTestResult.ps1
       arguments: $(KustoServicePrincipalTenantId) $(KustoServicePrincipalId) $(KustoServicePrincipalSecret) $(KustoClusterName) $(KustoClusterRegion) $(LiveTestDatabaseName) $(LiveTestTableName) $(TestCoverageTableName) $(DataLocation)
+    failOnStderr: true
+    retryCountOnTaskFailure: 3
 
   - task: PublishPipelineArtifact@1
     displayName: Publish live test results to pipeline artifact

tools/TestFx/Live/ConnectLiveTestServicePrincipal.ps1

@@ -16,6 +16,11 @@ param (
     [string] $ServicePrincipalSecret
 )
 
+$PreErrorActionPreference = $ErrorActionPreference
+$ErrorActionPreference = "Stop"
+
 $servicePrincipalSecureSecret = ConvertTo-SecureString -String $ServicePrincipalSecret -AsPlainText -Force
 $servicePrincipalCredential = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList $ServicePrincipalId, $servicePrincipalSecureSecret
 Connect-AzAccount -SubscriptionId $SubscriptionId -TenantId $TenantId -Credential $servicePrincipalCredential -ServicePrincipal
+
+$ErrorActionPreference = $PreErrorActionPreference