It has been moved to keystone_swift_operator_roles Change-Id: I74db43379fac55c75efcfbb5f7328c41661b5578
This is not the admin group per-se but the group where users can create/delete containers. This is will be fixed properly when the swift-keystone2 middleware would be commited in keystone (should be sometime soon).
We still need a link in /etc/swift until #885595 is fixed.