PluggableService: Fix interface to return list of cmd classes

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>

utils/src/com/cloud/utils/component/PluggableService.java

@@ -16,11 +16,12 @@
 // under the License.
 package com.cloud.utils.component;
 
+import java.util.List;
 import java.util.Map;
 
 // This interface defines methods for pluggable code within the Cloud Stack.
 public interface PluggableService {
     // The config command properties filenames that lists allowed API commands
     // and role masks supported by this pluggable service
-    Map<String, String> getProperties();
+    List<Class<?>> getCommands();
 }