[#1237] Make running coverage tests easier - supply aux params by default.
Now coverage reports can be run with just "./run_tests --with-coverage" to
get focused, noise-free report. Add --cover-html to that to get annotated HTML
report (stored in report.coverage directory of each app).
Also, fix up test set - "global" tests (syntax, etc.) were moved to
AlluraTesting and should run from there.
Signed-off-by: Paul Sokolovsky <email@example.com>