Build passing with Failing tests

Hi, some of the latest builds are passing, but with failing tests:
- https://travis-ci.org/zendframework/zf2/jobs/4445460/#L350
- https://travis-ci.org/zendframework/zf2/jobs/4393712/#L349
- https://travis-ci.org/zendframework/zf2/jobs/4393604/#L349

Imho this is a _big_ issue; I invite **not to fix** the tests until the build are passing.

As of yet, I was unable to figure out why this happens.
