Fix GT emulation in uctl1extraparticles_cfi.py

Hi Maria,

I found out Stephanie was right about the GT digis not being properly made from the UCT GCT digis.  The problem is that L1Trigger.GlobalTrigger.gtDigis_cfi and Configuration.StandardSequences.RawToDigi_Data_cff both define a module called gtDigis.  Here is a fix for the problem that saves both original GT and new GT.