Skip the test and fix Travis notifications
Merge pull request #245 from TheoChevalier/skip-tests

Skip the test and fix Travis notifications
travis: composer is now built in Travis, no need to download it
Travis intermittent failure: change object name for Cache::flush() method in case it clashes with the one for getKey()
put a timeout of 10s when getKey() test is ran from Travis to give time to tests to populate the cache folder