bzip2 missing on CentOS minimal

[upcFrost]

Hi, i've got stuck on some interesting issue. It turned out that bzip2 (which should be one of the basic tools) is not included into the CentOS 7 minimal install. Since this package is needed for the source build, i think it might be a good idea to add it to the comins_build.rb:46 package list just to check if it's installed