Keystone configuration changes:

* use randomized token
* configure in middleware keystone ip

Change-Id: I6291cd44f7c92dddb8df58a23f9740c7c16a6b1e
Implements: blueprint access-control-master-node
Merge branch 'keystone_settings' into authx

Conflicts:
	deployment/puppet/nailgun/examples/nailgun-only.pp

Change-Id: I5622b11a8cbb7893bea94370c6984c1a25140a0f