Allow for setting the policy for Log Management access
to something other than admin_required. There are cases
where I would want to allow access to Grafana, but not
access to Log Management and vica versa. Leave the default
policy for admin_required in place.
In production we use the identity scope for keystone
specific items. I'd like to be able to change the scope
for our policy checks to 'monitoring' which may not
exist everywhere.
Change-Id: If975e0366b94915d2a9e3982307abbdc20de4eb6
1180e8319e