add distinct data containers to confirmmigrationstatus

Author: sarav123

src/ServiceManagement/StorSimple/Commands.StorSimple/Cmdlets/Migration/ConfirmAzureStorSimpleLegacyVolumeContainerStatus.cs

@@ -46,7 +46,7 @@ public override void ExecuteCmdlet()
                 confirmMigrationRequest.Operation =
                     (MigrationOperation) Enum.Parse(typeof (MigrationOperation), MigrationOperation, true);
                 confirmMigrationRequest.DataContainerNameList = (null != LegacyContainerNames)
-                    ? new List<string>(LegacyContainerNames.ToList().Distinct())
+                    ? new List<string>(LegacyContainerNames.ToList().Distinct(StringComparer.OrdinalIgnoreCase))
                     : new List<string>();
                 var status = StorSimpleClient.ConfirmLegacyVolumeContainerStatus(LegacyConfigId, confirmMigrationRequest);
                 MigrationCommonModelFormatter opFormatter = new MigrationCommonModelFormatter();