Similar to https://issues.jenkins-ci.org/browse/JENKINS-9605

I'd like to be able to do the same thing for short-stacktrace and full-stacktrace.

The way I've got it setup, I'm producing testng-formatted reports, but I'm not using testNG itself. So my stacktraces are actually a stacktrace (short-stacktrace) and a full hierarchical trace (full-stacktrace). Both look terrible without html formatting.

Since the 'message' field is the closest thing that will work right now, i'll dump all that stuff in there, but ideally I'd like it to be the exception messages that I can leave un-escaped.

Also this may be a separate issue, but it looks like I cannot have both short-stacktrace and full-stacktrace displayed? If that's true I can open a separate jira.