This removes the systemd service templates and tasks from this role and
leverages a common systemd service role instead. This change removes a
lot of code duplication across all roles all without sacrificing features
or functionality. The intention of this change is to ensure uniformity and
reduce the maintenance burden on the community when sweeping changes are
needed.
In converting this role to use the common systemd_service role a
keystone_service dictionary was created in the defaults main.yml file.
This change follows the pattern of other services.
Change-Id: I70e1f6007d9f88f05ccdc737b210415274580a46
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>