Added CentOS 7.0.1406 (Minimal installation, Chef 12.0.1, VMware Fusion)

Added the latest version of CentOS 7 (64-Bit)

A mockup for version 7.0 is already in place - but to be able to use concrete version matching we need this version, too. In fact I believe that the version 7.0 is wrong as this is not what OHAI detects on the current CentoS 7 Core installation.