Only load tests under tests/mocha/
Only load tests under tests/mocha/

Fixes https://github.com/meteor-velocity/velocity/issues/173
abernix/meteor-mocha-web,mad-eye/meteor-mocha-web,mad-eye/meteor-mocha-web,abernix/meteor-mocha-web,kelbongoo/meteor-mocha-web,kelbongoo/meteor-mocha-web