Move master-chef to /opt/master-chef, to allow omnibus upgrade in /opt/chef
Allow to keep server with shell and vbox snapshot
Remove ppa
Upgrade to chef 10.24.4
Improve test5 : better ssh config
Add dependency for chef 11
Add missing dependency
Refactor vm bootstrap for tests
Merge branch 'master' of github.com:octo-technology/master-chef
Revert "bug fix in bootstrap chef script"

This reverts commit f7791863e60776e52a437a3ad92dbb2453a01977.