Revert "use get_server_identifier()"
Revert "use get_server_identifier()"

This reverts commit fddd08a3f93ff6145e20503770ac7e8b18d9e021.

mathn/jubatus,gintenlabo/jubatus,roselleebarle04/jubatus,jubatus/jubatus,elkingtonmcb/jubatus,rimms/jubatus,elkingtonmcb/jubatus,roselleebarle04/jubatus,rimms/jubatus,mathn/jubatus,gintenlabo/jubatus,jubatus/jubatus,jubatus/jubatus