tools/qa-checks: Add error trace and argument grouping

Full error traces are now printed for errors in check module files
to help locating errors.

Arguments are now formatted in groups based on the check module
they are from when printed in --help.

Issue-Id: SCM-3902
Signed-off-by: Joel Goddard <joel.goddard@arm.com>
Change-Id: I4de1b9114f20c3bb300d040ea5752598d73a7387