Fix for issue #561

Added got to homepage before clicking on the "new" tab.
Merge pull request #564 from chirarobert/fix_test

Fix for issue #561
Add an extra wait for test_opening_every_category_page_from_categories_menu. Fixes #559

Add wait for category link to be visible
Merge pull request #565 from bobsilverberg/category_wait

Add an extra wait into test_opening_every_category_page_from_categories_menu. Fixes #559
Xfail test test_opening_every_category_page_from_categories_menu until issue https://github.com/mozilla/marketplace-tests/issues/559 is fixed
Merge pull request #567 from AndreiH/xfail_category_open

Xfail test test_opening_every_category_page_from_categories_menu until i...
Remove pytest-mozwebqa version dependency