Remove deprecated address from keystone spec

When I57b8469fb816c37c9d6a285c07796f685b121a90 (Remove deprecated
parameter 'address') was merged openstack_keystone_spec.rb broke.
This change removes the use of the deprecated 'address'.

Change-Id: Ib6d74bfc0d13f5c13f523d5d98b4aea60cc4adaf

spec/classes/openstack_keystone_spec.rb

@@ -95,7 +95,6 @@ describe 'openstack::keystone' do
       it do
         should contain_class('swift::keystone::auth').with(
           :password => 'dude',
-          :address  => '127.0.0.1',
           :region   => 'RegionOne'
         )
       end