CLOUDIFY-2003 log ruote errors in error level and use flunk instead of relying on raising exceptions.
CLOUDIFY-2003 raise cosmo event when workflow execution ends.
Merge branch 'develop' into feature/CLOUDIFY-2003-ruote-exceptions-level-error

Conflicts:
	orchestrator/src/main/resources/scripts/ruby/participants/execute_task_participant.rb
CLOUDIFY-2003 change raise to flunk and set nodes concurrent iterator merge type to ignore
Merge pull request #61 from CloudifySource/feature/CLOUDIFY-2003-ruote-exceptions-level-error

CLOUDIFY-2003 log exceptions in error level and raise an event on workflow completion.