eFEX Isolation Variables saved to EDM; renamed some isolation variables for internal consistency.
Added isolation variables for eFEX egamma objects to EDM (Wstot, Reta, Rhad). Updated eFEXFPGA, eFEXSim and eFEXSysSim execute functions to use eFEXegTOB objects (which contain tobwords), rather than using raw tobwords. Also renamed some isolation variables to be more descriptive of physical meaning in various places (eg. getRetaNum -> getRetaCore).