Converted plugins/netbsd/virtualization to Mixlib::ShellOut.
Converted plugins/openbsd/cpu to Mixlib::ShellOut.
Converted plugins/openbsd/filesystem to Mixlib::ShellOut.
Converted plugins/openbsd/hostname to Mixlib::ShellOut.
Converted plugins/openbsd/kernel to Mixlib::ShellOut.
Converted plugins/openbsd/memory to Mixlib::ShellOut.