Fix Sails startup error in load test, ensure we're using open ports

I use this approach in my own app's tests to be sure I'm using an open port.
This feels a little heavy-handed compared to calling `sails.lower` after each
test run, but even when I tried that it was throwing errors about port 2001 not
being open.

Conflicts:
	package.json
Merge pull request #1434 from ndhoule/fix/load-test-error

Fix Sails startup error in load test, ensure tests use open ports