fix null ptr issue with the commandlet

Author: darshanhs90

src/ResourceManager/Resources/Commands.Resources.Test/ScenarioTests/ActiveDirectoryTests.ps1

@@ -463,6 +463,10 @@ function Test-NewADApplication
     # Assert
     Assert-NotNull $application
 
+    $apps =  Get-AzureRmADApplication 
+    Assert-NotNull $apps
+    Assert-True { $apps.Count -ge 0 }
+
 	# Get Application by ObjectId
 	$app1 =  Get-AzureRmADApplication -ObjectId $application.ObjectId
 	Assert-NotNull $app1

src/ResourceManager/Resources/Commands.Resources.Test/SessionRecords/Microsoft.Azure.Commands.Resources.Test.ScenarioTests.ActiveDirectoryTests/TestNewADApplication.json

@@ -53,7 +53,7 @@ public override void ExecuteCmdlet()
                 }
                 else
                 {
-                    Rest.Azure.OData.ODataQuery<Application> odataQueryFilter = null;
+                    Rest.Azure.OData.ODataQuery<Application> odataQueryFilter = new Rest.Azure.OData.ODataQuery<Application>();
 
                     if (ApplicationId != Guid.Empty)
                     {