Making postgresql accessible to all hosts.

In the postgresql cookbook, the correct option is pg_hba and not hba only, you can see this in 
 https://github.com/openruko/vagrant-openruko/blob/master/cookbooks/postgresql/README.md#configuration 

But I think this is not the best option, on whether security treaty, this is a door, whereas bridged as default network option on Vagrantfile.