PUBDEV-2439: Fix NPE due to name collision of user-given and internally created column called 'weights'
PUBDEV-2439: Fix NPE due to name collision of user-given and internally created column called 'weights'

YzPaul3/h2o-3,jangorecki/h2o-3,jangorecki/h2o-3,h2oai/h2o-dev,YzPaul3/h2o-3,YzPaul3/h2o-3,mathemage/h2o-3,michalkurka/h2o-3,h2oai/h2o-dev,michalkurka/h2o-3,michalkurka/h2o-3,YzPaul3/h2o-3,spennihana/h2o-3,h2oai/h2o-3,h2oai/h2o-3,mathemage/h2o-3,spennihana/h2o-3,h2oai/h2o-dev,spennihana/h2o-3,jangorecki/h2o-3,jangorecki/h2o-3,michalkurka/h2o-3,michalkurka/h2o-3,h2oai/h2o-3,h2oai/h2o-dev,h2oai/h2o-3,mathemage/h2o-3,YzPaul3/h2o-3,mathemage/h2o-3,spennihana/h2o-3,h2oai/h2o-3,spennihana/h2o-3,h2oai/h2o-dev,jangorecki/h2o-3,mathemage/h2o-3,mathemage/h2o-3,YzPaul3/h2o-3,jangorecki/h2o-3,h2oai/h2o-3,spennihana/h2o-3,michalkurka/h2o-3,YzPaul3/h2o-3,h2oai/h2o-dev,mathemage/h2o-3,h2oai/h2o-dev,spennihana/h2o-3,jangorecki/h2o-3,h2oai/h2o-3,michalkurka/h2o-3,h2oai/h2o-3