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
Travis intermittent fail: remove sleep() in getKey() plus explicitely activate a longer cache in bootstrap.php
Travis intermittent fail: deactivate flush method for Travis in case it creates a race condition for getKey (cache emptied by flush before getKey() is triggered)
Dynamic gaia view