* ansible_galaxy_install: use locale C tentatively, else en_US
* use custom exception to signal unsupported locale
* add step to remove artefacts at the end of the test
* add step to remove artefacts at the beginning of the test
* comment out context controller
* trying with temporary dir as destination
* remove collection before test with reqs file
* ensure collections are installed in temp dir in tests + check_force
* simplified the change
* added extra condition for failing locale
* improved exception handling
* add changelog fragment
