fixing HDInsight test initialization

Author: mumou

src/ServiceManagement/HDInsight/Commands.HDInsight.Test/Models/Utilities/IntegrationTestBase.cs

@@ -49,7 +49,7 @@ public class IntegrationTestBase : DisposableObject
             )]
         public static readonly IntegrationTestManager TestManager = new IntegrationTestManager();
 
-        private static bool IsInitialized = true;
+        private static bool IsInitialized = false;
         internal static Dictionary<string, string> testToClusterMap = new Dictionary<string, string>();
 
         protected static string ClusterPrefix;