Add KeystoneURL to Outputs section
Add KeystoneURL to Outputs section

Having the KeystoneURL accessible in Heat allows the user to access the
overcloud services using the service catalog.

Change-Id: Ie6ef1aadf2f027d0b0793fea59385832c9f0c25f

bcrochet/tripleo-heat-templates,openstack/tripleo-heat-templates,rdo-management/tripleo-heat-templates,wyg3958/tripleo-heat-templates,redhat-openstack/tripleo-heat-templates,bcrochet/tripleo-heat-templates,rdo-management/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,trozet/tripleo-heat-templates,wyg3958/tripleo-heat-templates,dprince/tripleo-heat-templates,bcrochet/tripleo-heat-templates,trozet/opnfv-tht,trozet/opnfv-tht,trozet/opnfv-tht,redhat-openstack/tripleo-heat-templates,trozet/tripleo-heat-templates