Wip/fredo/t5564

T5564 is about the canterbury test failures. Even though the general test was reporting passing, there were some intermediate test cases failing. Those test have been ported on a best effort basis, and some of them had issues (aka failed) on some platforms. The intent of this series is not to fix all the failure, but rather set a common ground of passing test. Hence :

• This series fix the issues reported in the test results: wrong pass, and no intermediate tests, the general test will fail if an intermediate test has failed
• It disables the failing test. In order to mitigate the negative impact of doing, we also checked what the original canterbury test were doing. Here is a test result for the original canterbury tests: https://lava.collabora.co.uk/results/1361246/1_canterbury. It turns out we are probably running less test than original, but not necessarily that many.
• It improves the test environment by allowing developers to run individual tests
• A few cosmetics changes, mostly lowering verbosity