Fix integration specs

[mongrelion]

Check the build history in Travis, from the number 15 all the way to the number 35. The checkout & user login integration specs keep failing even after playing around with timeout values, etc.

[mongrelion]

One important thing to mention here is that for the e2e tests to work properly we first need to wait for all of the services to come up. Before I tried using a sleep 30 somewhere but that's just nasty. A more elegant solution would be to check on the /health end point of each of the services.