Updated openstack/openstack
Project: openstack/heat  36a94ebd9ae9c866feabfba45f246b36fbfa637c

Bring over pretty_tox.sh from nova

- added full log for integration tests by default
- added env 'py27log' which allows to get log for unit-tests

Change-Id: I43ca330c82ffe100247102021fce1f00acb4d11a