Add barbican::worker to integration testing
Add barbican::worker to integration testing

Adds the new barbican::worker class to the
integration testing.

Depends-On: https://review.openstack.org/#/c/598165/
Change-Id: I8bd7a134390cdec244b3a60cf895c01cf26203d0

openstack/puppet-openstack-integration,openstack/puppet-openstack-integration,openstack/puppet-openstack-integration