tests: tidy up reporting of skipped tests if not verbose: - print 's' rather than '.' - pass skipped test reports back to parent for -j - report which tests were skipped at the end - print '.' after test completion

adding dir/bar
adding foo
dir/bar
foo
adding dir/bar_2
adding foo_2
dir/bar_2
foo_2
adding a
adding c
adding b
adding d
removing a
removing c
recording removal of a as rename to b (100% similar)