fix in glm early stopping - compute improvement relative to previous lambda instead of null model (does not make sense if null model is way off).
fix in glm early stopping - compute improvement relative to previous lambda instead of null model (does not make sense if null model is way off).

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