Removes opencontrail reference
Removes opencontrail reference

The opencontrail environment file was removed in commit da91bb6
so this is no longer required

Change-Id: I835dc665ede7fdb50d5be2c3251b8acf20c3ce37

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