webadmin: changing "Cluster Policy" to "Scheduling Policy"

Change-Id: I783489e9b9f71825a5a4ec54847cb002885c3694
Bug-Url: https://bugzilla.redhat.com/1099098
Signed-off-by: Kobi Ianko <kobi@redhat.com>
Signed-off-by: Jiri Moskovcak <jmoskovc@redhat.com>