[Installer] Add ability to test everything
[Installer] Add ability to test everything

Allow 'test all' to work and, following the advice of the TODO comment,
test everything if no implicit argument is given

masak/proto,perl6/modules.perl6.org,perl6/modules.perl6.org,perl6/modules.perl6.org,masak/proto,perl6/modules.perl6.org,masak/proto