Exclude testtools 1.4.0

When running tempest with testtools 1.4.0 attributes aren't being added to the
test_id. This causes the regex excludes we use for the slow tests in tempest to not
work, and the slow jobs get run everywhere, while the slow jobs fail to have any tests. 

Change-Id: I561e98bf363d2dd8e8b3a20cea7d2dcbfa034e98
Add oslo.context to projects.txt

Sort just the oslo section as well

Change-Id: I228ec5ae17d2c26c4872287b9ee76f48cb56087a