Updated openstack/openstack
Project: openstack/heat  40cfa261ff56d3edf8b27eafffcc07060fecee87

Import sqlalchemy module instead of classes

As required by H302, import the module.
Addressing comment in https://review.openstack.org/#/c/127535/

Change-Id: If7ef3a9e403ee4fa59dc9caf020751debde2d065