[TMVA] AvgROC -- Refactor GetAvgRocCurve
[TMVA] AvgROC -- Refactor GetAvgRocCurve

karies/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,karies/root,karies/root,root-mirror/root,root-mirror/root,karies/root,olifre/root,root-mirror/root,olifre/root,olifre/root,olifre/root,olifre/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,karies/root,karies/root,karies/root,olifre/root,root-mirror/root,karies/root,olifre/root,olifre/root,karies/root,root-mirror/root