Comment 3 for bug 1477484

Reviewed: https://review.openstack.org/205163
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=dc613540ddd406fb50f26204898ba561378ecfbd
Submitter: Jenkins
Branch: master

commit dc613540ddd406fb50f26204898ba561378ecfbd
Author: Steven Hardy <email address hidden>
Date: Thu Jul 23 11:34:06 2015 +0100

    Stop using eventlet threads in test_engine_service

    Currently we rely on actually running the tasks on in the
    stack ThreadGroup, which will be non-deterministic where
    wait() is not used (leading to some incorrect assertions)
    and unneccesarily complex even when using wait().

    So instead use a dummy implementation which allows for tasks
    to be either run immediately or just recorded so we can
    assert they would be started.

    Change-Id: I2a748cac50e380289c33eadfa1c53309f86ad145
    Partial-Bug: #1477484