Cleanup the launch_testing_examples. #374
Merged
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This is to make them more robust when run in parallel with other tests. In particular, we make sure that the tests cleanup after themselves, and we also increase the timeouts to 15 seconds.
This should improve some of the flaky tests in this package, like we see in https://ci.ros2.org/view/nightly/job/nightly_linux_repeated/3385/#showFailuresLink