[PUBDEV-3747] fix frame.hist() in python (#603)
[PUBDEV-3747] fix frame.hist() in python (#603)


spennihana/h2o-3,michalkurka/h2o-3,spennihana/h2o-3,h2oai/h2o-3,h2oai/h2o-3,h2oai/h2o-dev,spennihana/h2o-3,spennihana/h2o-3,spennihana/h2o-3,h2oai/h2o-3,h2oai/h2o-dev,michalkurka/h2o-3,h2oai/h2o-3,mathemage/h2o-3,h2oai/h2o-dev,mathemage/h2o-3,h2oai/h2o-dev,h2oai/h2o-3,mathemage/h2o-3,michalkurka/h2o-3,h2oai/h2o-dev,michalkurka/h2o-3,mathemage/h2o-3,h2oai/h2o-dev,michalkurka/h2o-3,spennihana/h2o-3,mathemage/h2o-3,h2oai/h2o-3,spennihana/h2o-3,mathemage/h2o-3,michalkurka/h2o-3,h2oai/h2o-3,michalkurka/h2o-3,h2oai/h2o-dev,mathemage/h2o-3,h2oai/h2o-3