tmf: only dispatch events to relevant event providers

tmf: only dispatch events to relevant event providers

When coalescing request across event providers (e.g. Experiment and
traces) then the requests done on the traces are not interested
in events from other requests. Before this patch each implementation
of handleData() had to do this.

Change-Id: I1482c79ef3a0359b9b3526212c4555b57c102650
Signed-off-by: Bernd Hufmann <Bernd.Hufmann@ericsson.com>
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/35969
Reviewed-by: Hudson CI
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>