Have freebsd port use pkg info if the freebsd version is >= 10000017

The port package provider for FreeBSD was not checking if the freebsd version is version 10. This causes the provider to attempt to use 'pkg_info' instead of 'pkg info'. This PR should fix this bug.
I didn't notice that either when I based this test off https://github.com/opscode/chef/blob/master/spec/unit/resource/freebsd_package_spec.rb#L76. I'll remove that line from both since it seems to be unncessary.