Cloudkittyclient now provides a plugin for the Openstack client.
setup.cfg was modified to provide entrypoints for the Openstack client. These
entrypoints can be found in the different shell_cli.py files.
Python-openstackclient was added to the requirements.
Implements: blueprint openstackclient-support
Change-Id: If0bbd919b1552b82cd77a52ded4f4ec32e6e14d8