Address CRs

Author: huangpf

src/ServiceManagement/Compute/Commands.ServiceManagement.Test/FunctionalTests/IaasCmdletInfo/SetAzureDeploymentCmdletInfo.cs

@@ -45,7 +45,11 @@ public static SetAzureDeploymentCmdletInfo SetAzureDeploymentConfigCmdletInfo(st
 
             result.cmdletParams.Add(new CmdletParam("Config"));
             result.cmdletParams.Add(new CmdletParam("Configuration", configPath));
-            result.cmdletParams.Add(new CmdletParam("ExtensionConfiguration", extConfig));
+
+            if (extConfig != null)
+            {
+                result.cmdletParams.Add(new CmdletParam("ExtensionConfiguration", extConfig));
+            }
 
             return result;
         }