 Use the pip version of h5py instead of the conda version (#1970)
 Use the pip version of h5py instead of the conda version (#1970)

* Use the pip version of h5py instead of the conda version.

Also alias pip3->pip for the python 3 environment.

* Fix extra ampersands.

googledatalab/datalab,parthea/datalab,googledatalab/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab,parthea/datalab