@Override
  public DeleteNamespaceResponse deleteNamespace(RpcController controller,
    DeleteNamespaceRequest request) throws ServiceException {
    try {
      long procId = server.deleteNamespace(request.getNamespaceName(), request.getNonceGroup(),
        request.getNonce());
      return DeleteNamespaceResponse.newBuilder().setProcId(procId).build();
    } catch (IOException e) {
      throw new ServiceException(e);
    }
  }
Returns list of blocking services and their security info classes that this server supports
hbase-server/src/main/java/org/apache/hadoop/hbase/master/MasterRpcServices.java