Setsebool must be run as root.

Change-Id: If79427bf42af4403328741e2c9bb469c4adeec53
Fix bug # #1197652 Editable default quota support for cinder

Added the command related infomation to cli-guide and the description to openstack-block-storage-admin guide

Patch set 1 edits for clarity

Change-Id: I09ee8155e9aa8247349e4bd0b562a9ea77055d58
Merge "Fix bug # #1197652 Editable default quota support for cinder"
Merge "Setsebool must be run as root."