Fix driver/anomaly_test to use pack/unpack
Fix driver/anomaly_test to use pack/unpack

gintenlabo/jubatus_core,gintenlabo/jubatus_core,rimms/jubatus_core,kumagi/jubatus_core,kmaehashi/jubatus_core,gintenlabo/jubatus_core,kmaehashi/jubatus_core,rimms/jubatus_core,gintenlabo/jubatus_core,kumagi/jubatus_core,kumagi/jubatus_core,kumagi/jubatus_core,kmaehashi/jubatus_core,kmaehashi/jubatus_core,rimms/jubatus_core,rimms/jubatus_core