Bug 1024715 - Create test_firefox_accounts_login to validate user authen...

...tication from Settings and FMD R=zacc,bebe
Sure, Zac.  I'll can split them up and add a manifest.ini.
As for moving these tests to a separate directory (like functional/fx_accounts), that isn't the convention used for firefox accounts elsewhere in gaia.  Since it acts more like a 'component' than an app, the FxA code is housed under apps/system/fxa as well as the Marionette JS tests (soon to land).  I'd prefer to stick with that convention, unless you have an objection (i.e. it's not really an app on it's own).