Adding start_time and end_time to array per request
Requring time - needed for iso8601 format
Merge pull request #2461 from opscode/tball/start-end-time

Adding start_time and end_time to JSON output per request
* Some primitive recipes that check basic functionality of audit mode.
* Fix a minor issue where the exception class was not being found correctly.
Disable audit phase during specs in order not to break the existing rspec configuration.
Instructions on running audit mode examples.
Fix the failing specs on Mac 10.10. (Not necessarily related to audit-mode but came across when passing all specs on my box)
More meaningful audit_mode configuration values.
Test including supported serverspec helpers. Updates per PR comments.