Fix test_create_server_with_unauthorized_image

Looks like nova is issuing a BadRequest again
Fix bug 1039608

Change-Id: I7956dd5d712c914102b37dbcfd934793680ee465
diff --git a/tempest/tests/compute/test_authorization.py b/tempest/tests/compute/test_authorization.py
index 0f0a8dd..afa60b3 100644
--- a/tempest/tests/compute/test_authorization.py
+++ b/tempest/tests/compute/test_authorization.py
@@ -174,7 +174,6 @@
         """A create image request for another user's server should fail"""
         self.alt_images_client.create_image(self.server['id'], 'testImage')
 
-    @unittest.skip("Skipped until the Bug #1039608 is resolved")
     @raises(exceptions.BadRequest)
     @attr(type='negative')
     def test_create_server_with_unauthorized_image(self):