Remove pointless `sudo` field in travis and force Mac JDK 8 build
Remove pointless `sudo` field in travis and force Mac JDK 8 build

TachiWeb/TachiWeb-Server,TachiWeb/TachiWeb-Server,TachiWeb/TachiWeb-Server,TachiWeb/TachiWeb-Server,TachiWeb/TachiWeb-Server