Fix and improve search autocomplete tests

The prepending of js- to the classname broke search autocomplete
tests.
Removed the login for project search, as autocomplete does
not require a logged in user, removing an approximate 10 second
delay per test.
Also changed the upload test to warn instead of fail on potentially
incomplete clean up.
Merge pull request #416 from zanata/fix-autocomplete-search-tests

Fix and improve search autocomplete tests