more locking related ui work

- unlocking files on submit
- unlocking file on revert
- adding AVMLockingAwareService to serviceregistry
- locking renditions (using the lockingawareservice)

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@6040 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/service/ServiceDescriptorRegistry.java

@@ -323,6 +323,15 @@ public class ServiceDescriptorRegistry
     {
         return (AVMService)getService(AVM_SERVICE);
     }
+
+    /**
+     * Get the AVMService.
+     * @return The AVMService or null if there is none.
+     */
+    public AVMService getAVMLockingAwareService()
+    {
+        return (AVMService)getService(AVM_LOCKING_AWARE_SERVICE);
+    }
     
     /**
      * Get the AVM Sync Service.