Updated openstack/openstack
Project: openstack/oslo.db  aaf82a463787dec4e9117d200ffa199ac22881d2

Add description for test_models_sync function

Add description of the diff list that is generated in
test_modes_sync function for readability reason.

Change-Id: I3ecaf2da5a22b1835e0c6604b59f9cd1874747de