L1: update of trd2d qa

• make trd2d qa work also with the standard LIT tracker
• macro macro/L1/run_reco_LITglobal.C to run the LIT global tracker with the QA task (it is basically a copy of run_reco.C macro with ideal eventbuilder on, and with the QA task)
• reconstruction of 3-hit-tracks

@a.bercuci, please have a look