Updated openstack/openstack
Project: openstack/trove  444840b22659b50ede3ab7c739d95142658c2f7a

Improve help strings

Follow oslo.config style guide for help strings better to create
consistent help strings:
* Finish help strings with "."
* Improve capitalization and wording

Closes-Bug: 1314446
Change-Id: I69c2d368f5fd048cfaa4c911433f76c33271320e