Updated openstack/openstack
Project: openstack/horizon  a4853bf94f51876de5b7e9a81c4fbc2739da4595

Improve list groups roles performance

Uses GET v3/role_assignments?scope.project.id=<project_id>
to fetch groups roles in a given project, instead of doing
an individual call for every known group.

Closes-Bug: 1369137
Change-Id: Ie64dfddc0d8cbb4f22f3ee3b19c248ca6973e96c