Add client recipe for identity

Add an explicit recipe for installing client
only packages.
Tests are also included.
Bumped minor version for this new feature.

Change-Id: Ib6ffb3e4f27d60c82feb81386427edeaf0336866
Addresses: blueprint add-client-recipes
Utilise ['openstack']['region'] from cookbook-openstack-common

- Set ['openstack']['identity']['region'] to equal ['openstack']['region']
- Add tests for endpoint creation, to confirm region is set.

Change-Id: I7c2842a15508d6f04802ea3cce7fbd3cf3e91137
Addresses: blueprint uniform-region
Merge "Add client recipe for identity"
Merge "Utilise ['openstack']['region'] from cookbook-openstack-common"