Fix error reporting using logging
Fix a regression in REST JSON rendering and fix an unhandled error handling issue (OMS-548)
Fix confusing help argument list formatting (OMS-555)
Fix usage of cancel_execute as a deferred callback (OMS-554)
Merge pull request #212 from opennode/oms-555

Fix confusing help argument list formatting (OMS-555)
Fix test_context_dependent_help (OMS-555)
Allow module.conf to be used as the confguration file name
Only set content-type to JSON header if we expect JSON to be sent
Make additional authenticators optional + improve logging on authentication handling (OMS-556)
Remove password logging debugging lefover (OMS-556)
Fixed a bug with incorrect string formatting
Fix Sudo by saving previous_interaction into Sudo object, not checker