downtime in consolidation, topology and selectors
fix trailing spaces
downtimes on topologies and selectors
undo downtime to keep track of what happends in metrics
typo: remove trailing spaces
added : downtime for each event
fix: bugs -> missing keys, amqp optimisations
added: downtime on all events
Merge branch 'downtimes' into develop

Conflicts:
	sources/amqp2engines/opt/amqp2engines/engines/selector.py
	sources/amqp2engines/opt/amqp2engines/engines/topology.py