heat: don't manage orchestration with openrc file

The orchestration should be managed in puppet-keystone, not here.
We are changing it here:
https://review.openstack.org/445681

Change-Id: I0bafdf747405ec9fb3375a32c0660586c64fa316

manifests/heat.pp

@@ -64,7 +64,6 @@ class openstack_integration::heat {
   class { '::heat::keystone::domain':
     domain_password => 'oh_my_no_secret',
   }
-  Keystone_user_role['heat_admin::heat@::heat'] -> File['/root/openrc']
   class { '::heat::client': }
   class { '::heat::api':
     service_name => 'httpd',