WIP: Python3.7 bugfixes
Reverts Python 3.7.6->3.6.5 for slc6 due to an old version of openssl. This fixes a number of python package build errors.
Also fixes a number of missing python package dependencies which were discovered due to this issue.
Reverts Python 3.7.6->3.6.5 for slc6 due to an old version of openssl. This fixes a number of python package build errors.
Also fixes a number of missing python package dependencies which were discovered due to this issue.