default void postRequestLock(ObserverContext<MasterCoprocessorEnvironment> ctx, String namespace,
    TableName tableName, RegionInfo[] regionInfos, String description) throws IOException {
  }
Called after new LockProcedure is queued.
@param ctx the environment to interact with the framework and master
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java