Do a better job determining what the arguments could mean; this supports
lazy devlopers who don't want to pass in full paths to all kinds of things.
Simple invocation can now be:
testmodule.py <modulename> - +
to read <modulename>.conf from src/modules/<modulename>/
When testing Python modules, passing option --lang should also
set the global 'locale' (to a BCP47 string, but hey) like it
already sets localeConf.LANG.
- Didn't run at all (at least since v3.1) because of mismatch between
GlobalStorage constructor arguments and use; special-case None
in the C++ code to allocate a new GlobalStorage object.
Module descriptors are now module.desc, no configuration allowed inside.
Module config files are <modulename>.conf, installed in
share/calamares/modules.
settings.conf is read from /etc/calamares, then share/calamares, and if
running with --debug also in the current dir.
Module config files are read from /etc/calamares/modules, then
share/calamares/modules, and if running with --debug also in
src/modules/<modulename> relative to the current dir.
