Adding constraints to the Hcal 25ns fit.

Adding Constraints to the 25ns method 2, dropping method 1 when pulse is below 5fC and sum pulses < 10fC, lowering method 2 threshold down to 3fC for TS4.
Is there a particular reason to change this line?
In  principle the bunch spacing should have no effect at all here.
(no OOT PU is treated)
Lukas