[3.8.6]Add vagrant vm

Add ready to use phraseanet development environment to ease the development process.

- [x] Add documentation in Devel section https://github.com/alchemy-fr/Phraseanet-Docs/pull/130
- [x] Remove vagrant directory & vagrantfile from packager
- [x] Refactor similar bash code between vms 
- [x] nginx vhost is broken
- [x] iptable brokes access to all ports