Use docker profile in docker_registry

Use docker profile in docker_registry

The docker_registry profile has resources to configure
the docker service and package. These conflict with the
entries in the tripleo::profile::base::docker class which
exists specifically to manage these resources (and has
unit tests).

This patch removes the duplicate resources and updates
the docker_registry profile to simply include the
base docker profile instead.

This instack-undercloud change below needs to land first.
Depends-On: I6154f4c7435b02b92f6f64687e9ee89d6b86186a

Change-Id: I75c740e7efc6662861c28caeb7fa965ba55438cb