Revert "Merge pull request #99 from nigelkersten/tickets/2.7.x/9143-make-macauthorization-work-on-lion"

This merge, along with the merge for pull #100 has 11 failing tests in
spec/unit/provider/system/launchd_spec.rb, reverting commit/merge until
resolved.

This reverts commit 88f1ef54dc08641c51dd40f8b0feb541e5961f69, reversing changes
made to 2828d22daef9996a94e08a3942f2bf85bdb5c7a0.