Refactor Robot Framework tests
Ignore failure on content chooser search tab test until fixed (refs. #285)

HT @datakurre
Simplify selector to avoid failures
Clean up tests and fix typos
Clean up tests

Remove unused variables
Try to avoid StaleElementReferenceException by waiting for content after AJAX call
Remove failing part on collection test

This have to be fixed and tested on all tiles (refs. #288)
Merge pull request #287 from collective/issue_286

Refactor Robot Framework tests