Use Vagrant's built-in support for Ansible provisioner. This eliminates the need
for a hosts file, and simplifies the ansible config file.
Renames config from .ansible.cfg to ansible.cfg since Ansible expects the file
to be called ansible.cfg and be adjacent to Vagrantfile when using the Vagrant
provisioner.
We now have 7 virtual machines in the Vagrant sandbox. This takes a lot
of memory. This might be a problem for some laptop and whon't help
testings.
Signed-off-by: Sébastien Han <sebastien.han@enovance.com>
Instead of having 5GB disks now we have 6 disks of 1GB per virtual
machine, which is more than enough for testing.
Signed-off-by: Sébastien Han <sebastien.han@enovance.com>