CLOUDIFY-1926 add metric to riemann events logger.
CLOUDIFY-1911 add log message when deployment is ready and wait for user input before closing management components.
add events module for sending riemann events in celery tasks.
Merge branch 'experience' into feature/CLOUDIFY-1960-event-logging

Conflicts:
	orchestrator/src/main/resources/org/cloudifysource/cosmo/manager/ManagerLogDescription-text.properties