Addressed code review comments

Author: vhamine

src/ServiceManagement/HDInsight/Commands.HDInsight/Cmdlet/NewAzureHDInsightClusterCmdlet.cs

@@ -57,7 +57,7 @@ public NewAzureHDInsightClusterCmdlet()
          *      Position 03: Certificate
          *      Position 04: Location
          *      Position 05: Credential
-         *      Position 06: ???
+         *      Position 06: ??? (Missed. To be fixed.)
          *      Position 07: Endpoint
          *      Position 08: HostedService
          *      Position 09: Version
@@ -74,7 +74,7 @@ public NewAzureHDInsightClusterCmdlet()
          *      Position 05: DefaultStorageAccountKey
          *      Position 06: DefaultStorageContainerName
          *      Position 07: Credential
-         *      Position 08: ???
+         *      Position 08: ??? (Missed. To be fixed.)
          *      Position 09: ClusterSizeInNodes
          *      Position 10: Endpoint
          *      Position 11: HostedService

src/ServiceManagement/HDInsight/Commands.HDInsight/Model/DataObjects/AzureHDInsightCluster.cs

@@ -190,7 +190,7 @@ public string VersionStatus
         }
 
         /// <summary>
-        ///     Gets the type of Operating System installed on cluster nodes.
+        /// Gets the type of Operating System installed on cluster nodes.
         /// </summary>
         public OSType OSType
         {