Remove skip for bug 1439371 on test_volume_boot_pattern

The bug is reported as fixed on master (Liberty). Because of change
Iac44c6a84a39a518f4800483558bbe5223a41359 the ceph job doesn't run on
stable/icehouse or stable/juno, but we'd need to get the cinder fix
backported to proposed/kilo or stable/kilo before we could enable the
test again otherwise it will break stable kilo runs of the ceph job.

Cinder fix: I688898b3841691369d73887f7eabdceb05155db1

Related-Bug: #1439371

Change-Id: Iaeef2aaa3400cdd55a5ecbdfe7d492d7df560289
diff --git a/tempest/scenario/test_volume_boot_pattern.py b/tempest/scenario/test_volume_boot_pattern.py
index 5bc24ea..8fa2df5 100644
--- a/tempest/scenario/test_volume_boot_pattern.py
+++ b/tempest/scenario/test_volume_boot_pattern.py
@@ -41,8 +41,6 @@
         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