Add missing domain parameter to _get_group_roles
Add missing domain parameter to _get_group_roles

Adds missing 'domain' parameter to function which
was causing errors when using keystone federation.

Change-Id: Icfc06feae806a9faf8f4d12bf2281dd6c9772989
Closes-Bug: 1733108
Signed-off-by: Michael Rice <17b9e1c64588c7fa6419b4d29dc1f4426279ba01@michaelrice.org>

openstack/openstack-ansible-plugins,openstack/openstack-ansible-plugins