It seems that CamelCase problems in codechecker continue hitting different system (case-sensitive) here and there. That's specially noticeable since recent inclusion of a new "moodle" standard sniff using a "PHPCompatibility" standard sniff, that is causing problems both under linux (CI servers) and windows (human users of the local_codechecker).

See: https://github.com/moodlehq/moodle-local_codechecker/pull/17

So this is about to get rid of such case-sensitiveness problems forever. And the plan is:

1) Rename the "phpcompatibility" to match the official "PHPCompatibility" name of the standard and its classes.
2) Rename the "Moodle" to match the official "moodle" name of the standard and its classes.

That way, there won't be any problem/confusion anymore. That's all.

Note: While this is being fixed, all the related CiBoT jobs in the CI servers have been halted to avoid getting wrong results for ongoing issues.