The keystone role needed a few updates to deal with modern Ansible.
* The changeset pulls in the needed updates to resolve issues causing
the keystone_sp plugin, which powers federation, to crash.
* The changeset pulls in style changes for keystone cert sync removing
the need for the role to leverage the now deprecated memcached key
module.
Closes-Bug: 1660626
Change-Id: I29d444c9631a7511123aa6cd521a20a0e7588645
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>