Draft: adding link to LRTElectrons to egammaTruthParticles. Get rid of LRTegammaTruthParticles
For egamma, in simulation, we build two egammaTruthParticles container. One for std egamma, one for LRT electrons. These containers are identical, only the decorations related to links to reconstructed objects are different. One can get rid of the LRTegammaTruthParticles container, and add a link to the recoLRTElectrons to the truth particles in egammaTruthParticles, in addition to the other links (to recoElectrons, recoPhotons)
ping @christos
Edited by Jean-Baptiste De Vivie De Regie