Bug 1049916 - Create Firefox Accounts smoke tests to validate user authe...

...ntication R=spenrose
Removing !== -1 and assert statements.  I've seen other testcases that don't do asserts at all unless checking a hard value (where I could see more utility for those).  So, I'm assuming there's really no need to 'assert' against navigation operations, text input etc, which is all I'm doing here.  When I force-fail a testcase without those assert statements, the results still correctly report test results, so I'll leave them out.