Implementation of Forward Electron EDM in xAODTrigger

Implement the EDM for Forward Electrons in xAODTrigger as requested. The new files are: Event/xAOD/xAODTrigger/Root/jFexFwdElRoIAuxContainer_v1.cxx Event/xAOD/xAODTrigger/Root/jFexFwdElRoI_v1.cxx Event/xAOD/xAODTrigger/Root/jFexSRjetRoI_v1.cxx Event/xAOD/xAODTrigger/xAODTrigger/jFexFwdElRoI.h Event/xAOD/xAODTrigger/xAODTrigger/jFexFwdElRoIAuxContainer.h Event/xAOD/xAODTrigger/xAODTrigger/jFexFwdElRoIContainer.h Event/xAOD/xAODTrigger/xAODTrigger/versions/jFexFwdElRoIAuxContainer_v1.h Event/xAOD/xAODTrigger/xAODTrigger/versions/jFexFwdElRoIContainer_v1.h Event/xAOD/xAODTrigger/xAODTrigger/versions/jFexFwdElRoI_v1.h