Can't launch protractor tests on saucelabs from teamcity
So I finally managed to launch my tests on Sauce from teamcity.
The issue was neither from teamcity nor sauce.
In fact my rake task launching the tests was also trying to launch webdriver and selenium servers which is done by saucelabs.Somehow it messed up everything.
Now that I have rewrote the tasks to only launch protractor <specfile> it works like a charm!