Fix jubatus/util test: refs #467
Fix jubatus/util test: refs #467

mathn/jubatus,kmaehashi/jubatus_core,kmaehashi/jubatus_core,kmaehashi/jubatus_core,kumagi/jubatus_core,rimms/jubatus_core,Asuka52/jubatus,jubatus/jubatus,rimms/jubatus,kumagi/jubatus_core,mathn/jubatus,elkingtonmcb/jubatus,kmaehashi/jubatus,roselleebarle04/jubatus,rimms/jubatus_core,gintenlabo/jubatus_core,gintenlabo/jubatus,elkingtonmcb/jubatus,kumagi/jubatus_core,kmaehashi/jubatus_core,gintenlabo/jubatus_core,kumagi/jubatus_core,gintenlabo/jubatus,jubatus/jubatus,rimms/jubatus_core,rimms/jubatus,roselleebarle04/jubatus,kmaehashi/jubatus,gintenlabo/jubatus_core,jubatus/jubatus,rimms/jubatus_core,gintenlabo/jubatus_core,Asuka52/jubatus