fixes to get successful test runs against stage https://accounts.stage.mozaws.net

These are some things I've had for a while to get passing tests in stage https://accounts.stage.mozaws.net

I don't like that the last commit hardcodes a wait, but I tried with setImplicitWaitTimeout and waitForVisible but the simple wait was giving me the best results (it was sporadically failing on some race when run against a remote server).

I don't really like the name 'env' either (too much like 'environment' in the same config file) but I couldn't come up with a better name. Suggestions?