Skip test_volume_boot_pattern until bug 1439371 is fixed

The check-tempest-dsvm-full-ceph job sets volume.storage_protocol to
'ceph' in devstack-gate and the test is failing with a ceph backend, so
skip it while that's being debugged.

The plan is to get the ceph job passing consistently so we can make it
voting on nova/cinder/glance changes so we can tell when a change
regresses it.

Related-Bug: #1439371

Change-Id: Ia1cba598a8243dd4a48613c870a25de578b79fe4
diff --git a/tempest/scenario/test_volume_boot_pattern.py b/tempest/scenario/test_volume_boot_pattern.py
index 8fa2df5..5bc24ea 100644
--- a/tempest/scenario/test_volume_boot_pattern.py
+++ b/tempest/scenario/test_volume_boot_pattern.py
@@ -41,6 +41,8 @@
         super(TestVolumeBootPattern, cls).skip_checks()
         if not CONF.volume_feature_enabled.snapshot:
             raise cls.skipException("Cinder volume snapshots are disabled")
+        if CONF.volume.storage_protocol == 'ceph':
+            raise cls.skipException('Skip until bug 1439371 is fixed.')
 
     def _create_volume_from_image(self):
         img_uuid = CONF.compute.image_ref