ansible/group_vars/all: Change default code directory to /vagrant/Tatoeba
ansible/group_vars/all: Change default code directory to /vagrant/Tatoeba

Change the default code directory of VM in which the whole Tatoeba
code resides to '/vagrant/Tatoeba' in order to make use of vagrant's
"synced folders" feature to sync the VM's code to the current directory
(which contains the "Vagrantfile") of the host machine so that the
developer can edit the code from host machine itself

Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2