provision/provision.sh: Manually install latest GoLang instead of using `apt`.
provision/provision.sh: Manually install latest GoLang instead of using `apt`.

The newest version in apt for Ubuntu 14.04 is only 1.6, which causes
issues with MailHog.

trepmal/varying-vagrant-vagrants,DrewAPicture/varying-vagrant-vagrants,Varying-Vagrant-Vagrants/VVV,saucal/VVV,Varying-Vagrant-Vagrants/VVV,speartail/VVV,DrewAPicture/varying-vagrant-vagrants,saucal/VVV,clreed87/VVV,saucal/VVV,trepmal/varying-vagrant-vagrants,Varying-Vagrant-Vagrants/VVV,speartail/VVV,clreed87/VVV