@Override
  public ReplicationPeerManager getReplicationPeerManager() {
    return replicationPeerManager;
  }
Reopen regions provided in the argument
@param tableName   The current table name
@param regionNames The region names of the regions to reopen
@param nonceGroup  Identifier for the source of the request, a client or process
@param nonce       A unique identifier for this operation from the client or process identified
                   by <code>nonceGroup</code> (the source must ensure each operation gets a
                   unique id).
@return procedure Id
@throws IOException if reopening region fails while running procedure
hbase-server/src/main/java/org/apache/hadoop/hbase/master/HMaster.java