Skip test_volume_backup_create_get_detailed_list_restore_delete

This test is very unstable and failing very frequently now a days
19 fails in 24 hrs / 137 fails in 10 days
- http://status.openstack.org/elastic-recheck/#1483434

Let's skip this until bug is fixed to avoid unstable gate.
Related-Bug: #1483434

Change-Id: Id107766126b31028920092ab098b084557d327cf
diff --git a/tempest/api/volume/test_volumes_backup.py b/tempest/api/volume/test_volumes_backup.py
index c178272..6ce5d3e 100644
--- a/tempest/api/volume/test_volumes_backup.py
+++ b/tempest/api/volume/test_volumes_backup.py
@@ -50,6 +50,7 @@
                                                 'available')
         return restored_volume
 
+    @decorators.skip_because(bug="1483434")
     @testtools.skipIf(CONF.volume.storage_protocol == 'ceph',
                       'ceph does not support arbitrary container names')
     @decorators.idempotent_id('a66eb488-8ee1-47d4-8e9f-575a095728c6')