Improve exception output in teamcity printer

[olivernybroe]

Q	A
Bug fix?	yes
New feature?	no

Our teamcity printer didn't do the cleanup on the exception which phpunit does, so I added that in.

it("fails", function () {
    throw new Exception("fails");
});

It still does not use collision, as I cannot figure out how to make that work. However this will at least help a lot of users with debugging their exceptions.

New result:

Old result:

[nunomaduro]

Fell free to merge this @olivernybroe, and tag a new release with this feature.