Modify combiner to allow setting of start/stop day range for combining events.

New Config Values:
	collector.combiner.days-ago-to-start
	collector.combiner.days-ago-to-end
	collector.combiner.days-ago-disabled
Obsolete:
	collector.combiner.min-days-back (replaced by: collector.combiner.days-ago-to-start)

Goal: Combiner instance to handle old events coming in late
Fix confusing config parameter names
[maven-release-plugin] prepare release 1.14.39
[maven-release-plugin] prepare for next development iteration
D-04513 Add a combiner group id config + field to combiner fired events
[maven-release-plugin] prepare release 1.14.40
[maven-release-plugin] prepare for next development iteration
Support Parallel Combining using multiple threads.

Event types can be split up into three priority levels. High priority
events are scheduled using an executor with sufficient threads to ensure
each event type is given its own thread. Low priority event types are
scheduled in series using the same single-threaded executor, and all
other (normal priority) events are scheduled using an multi-threaded
executor with a configurable number of threads.

As a consequence of this, CombineComplete events are generated for each
event type.
[maven-release-plugin] prepare release 1.14.41
[maven-release-plugin] prepare for next development iteration
Upgrade to Platform 0.62
Upgrade to Platform 0.65
Upgrade to Platform 0.69
Upgrade to Platform 0.70