Comment 2 for bug 1428728

This has been failing on my review the last couple of times Jenkins has run unit tests against it:

https://review.openstack.org/#/c/154521/

If I run the full test suite on my development machine, then I can't reproduce it (the opposite behavior to infra Jenkins which seems to reliably trigger it when running the full test suite).

If I run just the nova.tests.unit.test_context.ContextTestCase.test_store_when_no_overwrite test, then it fails reliably for me.

I'm guessing either a race condition or something isn't cleaning up state in between tests correctly.