Merge branch 'mengzhen/Lb2LcpipiMuNu_Lc2LambdaPi' into 'master'
Lb2LcpipiMuNu_Lc2LambdaPi
See merge request !1463 (merged)
(cherry picked from commit 36c0e926)
5705058e Lb2LcpipiMuNu_Lc2LambdaPi 4b2fb793 add Rich threshold cut for long track pions