Update DeleteEventsCmd.java

Author: winterhazel

api/src/main/java/org/apache/cloudstack/api/command/user/event/DeleteEventsCmd.java

@@ -101,7 +101,7 @@ public void execute() {
             SuccessResponse response = new SuccessResponse(getCommandName());
             setResponseObject(response);
         } else {
-            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Unable to delete any events. One or more parameters have invalid values.");
+            throw new ServerApiException(ApiErrorCode.INTERNAL_ERROR, "Unable to delete any events. No events found matching the specified criteria.");
         }
     }
 }