Updated openstack/openstack
Project: openstack/sahara  93a7f6b71da785be56669f14ed8dd3ce632b071f

Update oslo-incubator db.sqlalchemy module

Changes -
 * pep8: fixed multiple violations
 * Prevent races in opportunistic db test cases
 * Fix Sphinx directive name

Change-Id: Ibc42553bf3730e02a4c98bdfad1509f16d16cb61