Add tests for OpenBSD ifconfig with bridge(4) rules.

http://projects.puppetlabs.com/issues/16630
Add LinuxMint to operating system facts
adding tests for LinuxMint facts
Merge branch 'pull-453'

This closes GH-453.
(maint) Use `expect` blocks over procs in specs
Merge branch 'pull-471'

This closes GH-471
(#21250) Fix zfs_version on old versions of Solaris 10
Merge branch 'pull-457'

This closes GH-457