Updated openstack/openstack
Project: openstack/oslo.messaging  e9821fe602344c6e755a1510ddd60f7ed0f09853
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: Ia08fa09593661e6e5b834d98bbd92689c2674075