Bug 816688 Output test messages in the tinderbox standard

[Mossop]

I wasn't totally sure the best way to approach this, but this replaces the console for tests with a custom one that outputs lines in the expected format for tinderbox. Every test starts with TEST-START and ends with TEST-END, with TEST-INFO, TEST-PASS, TEST-KNOWN-FAIL, TEST-UNEXPECTED-FAIL and TEST-UNEXPECTED-PASS in between. Each line also includes the running test where possible.

[Gozala]

This looks fine, only thing is I would rather prefer if we had argument for a logging mode instead, so for humans output will remain same, but for tinderbox we could do something like cfx testall --parsable or something along that lines.

Also I could live with this output too.

[Mossop]

@Gozala I've updated this to add a --parseable flag to cfx that switches to the new logging format.

[Gozala]

@Mossop Looks good to me, only thing I'm not sure about is that in --parsable mode no stack traces are printed. Is that intentional ? Ability to see stacks traces on failures in tinderbox had being pretty useful, specially on ones that are hard to reproduce on local machine.

If printing stack traces makes sense please do so, otherwise feel free to land. Either way I don't think we need any more iterations on this.

[Mossop]

Oh that's not intentional, I'll make it output stacks before landing.