Travis - don't try to re-install mongodb as it causes build to hang on a config file prompt
Travis - don't try to re-install mongodb as it causes build to hang on a config file prompt

mysociety/popit,mysociety/popit,Sinar/popit,mysociety/popit,openstate/popit,Sinar/popit,mysociety/popit,mysociety/popit,openstate/popit,openstate/popit,openstate/popit,Sinar/popit,Sinar/popit