Add localhost to the list of Horizon's ALLOWED_HOSTS

Some monitoring scripts (such as openstack-utils) that live on the same
machine rely on Horizon being available on localhost in order to
function correctly.

Change-Id: Ia4716cca62a4009369ef3f25dd53ef998913511c
Add cinder API v2 endpoint to keystone

Change-Id: I90eab888f727a0cb5b5b5e00efc593000df98c55
Fixes: rhbz#1030088
Merge "Add cinder API v2 endpoint to keystone"
Merge "Add localhost to the list of Horizon's ALLOWED_HOSTS"