HBASE-22298 branch-2.2 nightly fails "[ForOverride] Method annotated @ForOverride must have protected or package-private visibility"

hbase-server/src/main/java/org/apache/hadoop/hbase/master/ClusterSchemaServiceImpl.java

@@ -55,7 +55,7 @@ class ClusterSchemaServiceImpl extends AbstractService implements ClusterSchemaS
   }
 
   @Override
-  public synchronized void doStart() {
+  protected synchronized void doStart() {
     try {
       notifyStarted();
       this.tableNamespaceManager.start();