use new python_packages attributes from -common

*_python_packages attributes are being moved to -common in order to
remove the duplication from all the cookbooks which are using them

Change-Id: I24ffe60161ccdb2e54d3f1362db02ea08843b920
Implements: blueprint move-python-db-client-attrs-to-common
Merge "use new python_packages attributes from -common"