Make auth API version configurable in the usual way

The expectation that overriding node[openstack][api][auth][version]
would set this value for the dashboard, too, can now be met.

Change-Id: Icd1492911f910dfdbee685194ca870748b421776
remove support for Fedora

We're not supporting the Fedora platform. Get rid of the Fedora-specific
code and especially the tests which would fail unless they are
maintained going forward.

Change-Id: Ia876314b72777d591471a605d44fec01ae459438
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 "remove support for Fedora"
Merge "use new python_packages attributes from -common"
Update Gemfile and remove lock

berkshelf 2.0.18 needed for Supermarket
Gem lock file not useful in master branch

Change-Id: I8650269290b771d758c6965449eafbed7f29411a