Switch to Semantic Versioning

Configure the identity coobook with the new versioning scheme we
discusssed on the ML. It will start out at 7.0.0(7th OpenStack
release).

Fixes: Bug 1183687
Change-Id: I590916cde469a338a9e5a43a29176fff797f3d52
use new Boolean type for user/tenant_name attributes

Change-Id: I3a66e2c5c467aa693fc636306a979a1ef8de6acd
Implement support for grizzly release.

Added {public,admin}_endpoint to keystone.conf and updates paste configuration.

Change-Id: I8fd87d4f19fa3c23edbaef674d7b4d908722b0f1
rely on the openstack-common cookbook for the mysql recipes

Change-Id: I81e8c36de92fe74596296bd351b37a8213f055f7
install client libraries depending on the database type

Change-Id: Ib17ce484321d8dcc85b2dd0411cece0b328593c6
tenant_enabled should be a Boolean, not a String

Change-Id: I2d5215321e842e48a281790d66dd5d8bca963601