Update Ecal Gain.xml for Sim10 (2011/2012 MC)
Update Ecal ActiveToTotal parameter (7.66->7.20) for Sim10 Set L0Corrections to 1.00 as those parameters was actually never set for data taking
This updated Gain.xml condition can be propagated for all Run1 MC in SimCond (2011->2013), i.e. other (L0)gain parameters are consistent with run1 data