Add bug skip for test_container_synchronization()

This commit adds a skip to test_container_synchronization(). This test
currently only gets run during the periodic -all job because of it's
slow tag. It is currently failing 100% of the time and has been in this
state for quite some time. So let's skip it until the underlying bug is
fixed.

Related-Bug: #1317133

Change-Id: Iff71b74a377cf80be21516c546031e784a61f836
diff --git a/tempest/api/object_storage/test_container_sync.py b/tempest/api/object_storage/test_container_sync.py
index 6bda83b..5f46d01 100644
--- a/tempest/api/object_storage/test_container_sync.py
+++ b/tempest/api/object_storage/test_container_sync.py
@@ -67,6 +67,7 @@
         super(ContainerSyncTest, cls).tearDownClass()
 
     @test.attr(type='slow')
+    @test.skip_because(bug='1317133')
     def test_container_synchronization(self):
         # container to container synchronization
         # to allow/accept sync requests to/from other accounts