Updated openstack/openstack
Project: openstack/glance  54974bb27ff5f5acb1b0243e639facee5ec56c64
null
Improve help strings

Follow oslo.config style guide for help strings better to create
consistent help strings:
* Capitalize first word of each help string
* Finish help strings with "."

Change-Id: Iac0a0fc0ea6c0cf23f2523fe6030a842810b6909