Added net-tools as a package for CentOS 7 builds; net-tools provides tools like ifconfig that some other programs like Vagrant and Puppet's Facter need.
Added net-tools as a package for CentOS 7 builds; net-tools provides tools like ifconfig that some other programs like Vagrant and Puppet's Facter need.

danieldreier/packer-templates,nickchappell/packer-templates