Updated Consumer Pages/Developer Hub/Mobile Tests to use Firefox Accounts and Appium

I updated all the tests Mobile/Desktop to use Firefox Accounts and Appium for mobile.
I think that we shouldn't spend any more time writing Persona code
Here are the adhocs:
desktop : http://selenium.qa.mtv2.mozilla.com:8080/view/Marketplace/job/marketplace.dev.saucelabs.FxA_all_tests/
mobile : http://selenium.qa.mtv2.mozilla.com:8080/view/Marketplace/job/marketplace.dev.mobile.saucelabs.appium/