Add L1ID to MuonValidation/MuonTesterTree EventInfoBranch

cc @jojungge

MuonSpectrometer/MuonValidation/MuonTesterTree/MuonTesterTree/EventInfoBranch.h

-
 /*
   Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
 */
@@ -26,8 +25,9 @@ private:
     ScalarBranch<unsigned long long>& m_evtNumber{m_parent.newScalar<unsigned long long>("evtNumber")};
     ScalarBranch<uint32_t>& m_runNumber{m_parent.newScalar<uint32_t>("runNumber")};
     ScalarBranch<uint32_t>& m_lbNumber{m_parent.newScalar<uint32_t>("lbNumber")};
+    ScalarBranch<uint32_t>& m_l1id{m_parent.newScalar<uint32_t>("l1id")};
 
     ScalarBranch<uint32_t>& m_mcChannel{m_parent.newScalar<uint32_t>("mcChanneNumber")};
     ScalarBranch<double>& m_weight{m_parent.newScalar<double>("evtWeight")};
 };
-#endif
\ No newline at end of file
+#endif