Removes env variable port/host override from pygcp. Fix metadata version number to v1beta1.
Removes env variable port/host override from pygcp. Fix metadata version number to v1beta1.

parthea/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab,craigcitro/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab,yebrahim/datalab,parthea/datalab,craigcitro/datalab,yebrahim/datalab,googledatalab/datalab,yebrahim/datalab,yebrahim/datalab,googledatalab/datalab,craigcitro/datalab,craigcitro/datalab,yebrahim/datalab,googledatalab/datalab,craigcitro/datalab,parthea/datalab