Updated openstack/openstack
Project: openstack/tempest  ea42f113cfce493df22208b56d67ce5b26772c7f

Use correct base test class for test_stress unit tests

This commit switches the stress test unit tests to use the correct
base test class. It was previously using the tempest test base test
class instead of the unit test one.

Change-Id: I518d5b50abbd8c54335e7d5f1a53e0c1b6e36673