Increase test coverage for parsing .travis.yml
Increase test coverage for parsing .travis.yml

For now excluding a build that doesn't exist isn't a failure and
we want to keep it that wawy. Also test *including* a build.

buildbot/buildbot_travis,tardyp/buildbot_travis,buildbot/buildbot_travis,tardyp/buildbot_travis,isotoma/buildbot_travis,tardyp/buildbot_travis,isotoma/buildbot_travis,buildbot/buildbot_travis,tardyp/buildbot_travis