Add missing keystone_domain_config
Add missing keystone_domain_config

When configuring the keystone LDAP integration we need to write out
domain configuration items using the keystone_domain_config provider.
Since this tag was missed in the docker conversion, the configuration
was not actually available in the docker container.

Change-Id: I7abdfdd55e38da80768c907863fa06429debf9cd
Closes-Bug: #1737799

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