Add unit tests for Audit::ControlGroupData
Updates based on feedback from https://github.com/opscode/chef/pull/2533
Merge branch 'audit-mode' of github.com:opscode/chef into mcquin/control_group_data_spec
Update for audit-mode changes.
Merge pull request #2556 from opscode/mcquin/control_group_data_spec

Add unit tests for Audit::ControlGroupData