client: comment generates warning on publishLocal

[kmaehashi]

https://github.com/jubatus/jubatus-on-yarn/blob/master/jubatusonyarn/jubatus-on-yarn-client/src/main/scala/us/jubat/yarn/client/JubatusYarnApplication.scala#L76

juba${aLearningMachineType_proxy} must be juba${aLearningMachineType}_proxy instead.