Remove deprecated keystone::admin_port
Remove deprecated keystone::admin_port

... because the parameter has no effect now[1].

[1] Ibc8023caf8ad4ee16ebc08a943bdcc9f188c73c1

Change-Id: I93701306d29b8441e0eca111ceb513bb723eb54f

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates