New ECAL Unpacker code , off in sequences for the time being

New Ecalunpacker module from Philippe Gras. Not used in standard sequences for this PR. We plan to activate it at a later time.
better invert the logic so that all standard code is in place
and skips are applied only for the timer.
Considering that this is a separate method, it's more practical to just look at the profiler output (igprof, or callgrind) instead of relying on the timer.