Add hypen to the prefix/suffix of container name if not provided
Add hypen to the prefix/suffix of container name if not provided

If suffix is provided without hypen at the start, prefix hypen
to the suffix, to support creation of image names like
openstack-nova-compute-docker, where docker is the suffix.
Also if prefix is provided without hypen at the end, add hypen
at the end of the prefix.
Closes-Bug: #1709777

Change-Id: I2330a6f35a12bf140da8b52114cb20844efc5554

openstack/tripleo-common,openstack/tripleo-common