[Az.Migrate] Fix for kvspnid coming as Null for some users (Azure#21719)

* Fix for kvspnid coming as Null for some users

* Fix of file encoding

Author: singhabh27

src/Migrate/custom/Initialize-AzMigrateReplicationInfrastructure.ps1

@@ -356,7 +356,7 @@ public static int hashForArtifact(String artifact)
                     if ($CloudEnvironMent -eq "AzureUSGovernment") {
                         $HyperVManagerAppId = "AFAE2AF7-62E0-4AA4-8F66-B11F74F56326"
                     }
-                    $hyperVManagerObject = Get-AzADServicePrincipal -ApplicationID $HyperVManagerAppId				
+                    $hyperVManagerObject = Get-AzADServicePrincipal -ApplicationID $HyperVManagerAppId
                     $accessPolicies = @()
                     $userAccessPolicy = @{
                         "tenantId"    = $tenantID;
@@ -449,7 +449,24 @@ public static int hashForArtifact(String artifact)
                 # RoleAssignments
 
                 $roleDefinitionId = "81a9662b-bebf-436f-a333-f67b29880f12"
-                $kvspnid = (Get-AzADServicePrincipal -DisplayName "Azure Key Vault" )[0].Id
+                $kvspnid = Get-AzADServicePrincipal -DisplayName "Azure Key Vault"
+                $Id = ""
+                if($kvspnid -ne $null){
+                    $type = $kvspnid.GetType().BaseType
+                    Write-Host $type.Name
+                    if ($type.Name -eq "Array"){
+                        $Id = $kvspnid[0].Id
+                    }
+                    else{
+                         $Id = $kvspnid.Id
+                    }
+                }
+                else{
+                    Write-Host "Unable to retrieve KV SPN Id"
+                }
+                Write-Host $Id
+
+                $kvspnid = $Id
                 $gwyStorageAccount = Get-AzResource -ResourceName $GateWayStorageAcName -ResourceGroupName $ResourceGroupName 
                 $lsaStorageAccount = Get-AzResource -ResourceName $LogStorageAcName -ResourceGroupName $ResourceGroupName
                 $gwyRoleAssignments = Get-AzRoleAssignment -ObjectId $kvspnid -Scope $gwyStorageAccount.Id -ErrorVariable notPresent -ErrorAction SilentlyContinue