updates these numbers in TTreePerfStats::FileReadEvent() (in preparation for multi TTree monitoring)
updates these numbers in TTreePerfStats::FileReadEvent() (in preparation for multi TTree monitoring)

Currently TTreePerfStat reports the number of disk reads, by obtaining the total number of reads and their total size from the TFile, which will include calls from the TFile::Open() which are not strictly caused by TTree. This patch (also in preparation for multi TTree monitoring) updates these numbers in TTreePerfStats::FileReadEvent().

jrtomps/root,mkret2/root,zzxuanyuan/root-compressor-dummy,esakellari/my_root_for_test,thomaskeck/root,omazapa/root,root-mirror/root,sawenzel/root,zzxuanyuan/root,agarciamontoro/root,gganis/root,BerserkerTroll/root,pspe/root,thomaskeck/root,mkret2/root,krafczyk/root,zzxuanyuan/root,sirinath/root,bbockelm/root,CristinaCristescu/root,mkret2/root,veprbl/root,CristinaCristescu/root,zzxuanyuan/root-compressor-dummy,omazapa/root,BerserkerTroll/root,mhuwiler/rootauto,BerserkerTroll/root,evgeny-boger/root,sirinath/root,sirinath/root,pspe/root,satyarth934/root,simonpf/root,satyarth934/root,davidlt/root,zzxuanyuan/root-compressor-dummy,abhinavmoudgil95/root,omazapa/root-old,sawenzel/root,sawenzel/root,dfunke/root,simonpf/root,satyarth934/root,olifre/root,esakellari/root,Y--/root,0x0all/ROOT,arch1tect0r/root,lgiommi/root,veprbl/root,davidlt/root,dfunke/root,smarinac/root,mhuwiler/rootauto,satyarth934/root,mhuwiler/rootauto,davidlt/root,vukasinmilosevic/root,karies/root,abhinavmoudgil95/root,evgeny-boger/root,omazapa/root,omazapa/root,mhuwiler/rootauto,karies/root,beniz/root,davidlt/root,gbitzes/root,arch1tect0r/root,jrtomps/root,agarciamontoro/root,pspe/root,karies/root,dfunke/root,nilqed/root,esakellari/my_root_for_test,arch1tect0r/root,agarciamontoro/root,sirinath/root,olifre/root,esakellari/my_root_for_test,esakellari/my_root_for_test,simonpf/root,root-mirror/root,evgeny-boger/root,sawenzel/root,thomaskeck/root,krafczyk/root,krafczyk/root,abhinavmoudgil95/root,CristinaCristescu/root,abhinavmoudgil95/root,Y--/root,lgiommi/root,zzxuanyuan/root,dfunke/root,georgtroska/root,sbinet/cxx-root,vukasinmilosevic/root,gbitzes/root,olifre/root,esakellari/root,Duraznos/root,beniz/root,bbockelm/root,esakellari/my_root_for_test,evgeny-boger/root,veprbl/root,Y--/root,dfunke/root,0x0all/ROOT,esakellari/my_root_for_test,Duraznos/root,sirinath/root,lgiommi/root,mhuwiler/rootauto,veprbl/root,thomaskeck/root,olifre/root,esakellari/root,sbinet/cxx-root,buuck/root,perovic/root,veprbl/root,satyarth934/root,krafczyk/root,BerserkerTroll/root,satyarth934/root,karies/root,davidlt/root,evgeny-boger/root,mkret2/root,omazapa/root-old,krafczyk/root,davidlt/root,georgtroska/root,sawenzel/root,satyarth934/root,BerserkerTroll/root,zzxuanyuan/root-compressor-dummy,mattkretz/root,pspe/root,vukasinmilosevic/root,omazapa/root-old,abhinavmoudgil95/root,agarciamontoro/root,mattkretz/root,mattkretz/root,krafczyk/root,vukasinmilosevic/root,olifre/root,root-mirror/root,beniz/root,Y--/root,satyarth934/root,Duraznos/root,agarciamontoro/root,omazapa/root-old,0x0all/ROOT,nilqed/root,smarinac/root,olifre/root,buuck/root,karies/root,gbitzes/root,beniz/root,perovic/root,BerserkerTroll/root,omazapa/root-old,thomaskeck/root,arch1tect0r/root,esakellari/root,omazapa/root,CristinaCristescu/root,zzxuanyuan/root,beniz/root,Duraznos/root,mkret2/root,gganis/root,agarciamontoro/root,Y--/root,sirinath/root,agarciamontoro/root,olifre/root,perovic/root,pspe/root,omazapa/root-old,zzxuanyuan/root,satyarth934/root,davidlt/root,beniz/root,buuck/root,buuck/root,mkret2/root,mhuwiler/rootauto,karies/root,buuck/root,Y--/root,root-mirror/root,CristinaCristescu/root,smarinac/root,lgiommi/root,krafczyk/root,Y--/root,gbitzes/root,veprbl/root,gganis/root,0x0all/ROOT,buuck/root,esakellari/my_root_for_test,simonpf/root,veprbl/root,jrtomps/root,simonpf/root,sbinet/cxx-root,sirinath/root,vukasinmilosevic/root,pspe/root,vukasinmilosevic/root,beniz/root,omazapa/root-old,zzxuanyuan/root,simonpf/root,Duraznos/root,root-mirror/root,sirinath/root,lgiommi/root,sawenzel/root,vukasinmilosevic/root,sbinet/cxx-root,pspe/root,bbockelm/root,sbinet/cxx-root,jrtomps/root,zzxuanyuan/root-compressor-dummy,esakellari/my_root_for_test,thomaskeck/root,zzxuanyuan/root,zzxuanyuan/root-compressor-dummy,evgeny-boger/root,gbitzes/root,esakellari/root,esakellari/root,bbockelm/root,lgiommi/root,esakellari/root,buuck/root,bbockelm/root,arch1tect0r/root,mhuwiler/rootauto,olifre/root,dfunke/root,omazapa/root,smarinac/root,Duraznos/root,arch1tect0r/root,georgtroska/root,thomaskeck/root,Duraznos/root,mkret2/root,lgiommi/root,sawenzel/root,lgiommi/root,thomaskeck/root,buuck/root,mattkretz/root,bbockelm/root,esakellari/my_root_for_test,dfunke/root,georgtroska/root,mhuwiler/rootauto,simonpf/root,bbockelm/root,georgtroska/root,root-mirror/root,gganis/root,simonpf/root,gganis/root,smarinac/root,jrtomps/root,simonpf/root,BerserkerTroll/root,beniz/root,simonpf/root,CristinaCristescu/root,karies/root,vukasinmilosevic/root,nilqed/root,esakellari/root,perovic/root,gbitzes/root,dfunke/root,lgiommi/root,nilqed/root,mkret2/root,CristinaCristescu/root,mattkretz/root,satyarth934/root,CristinaCristescu/root,jrtomps/root,davidlt/root,buuck/root,georgtroska/root,pspe/root,sbinet/cxx-root,sawenzel/root,smarinac/root,esakellari/root,nilqed/root,veprbl/root,root-mirror/root,perovic/root,agarciamontoro/root,BerserkerTroll/root,buuck/root,0x0all/ROOT,root-mirror/root,bbockelm/root,perovic/root,Y--/root,nilqed/root,BerserkerTroll/root,veprbl/root,bbockelm/root,krafczyk/root,esakellari/root,pspe/root,agarciamontoro/root,zzxuanyuan/root,krafczyk/root,dfunke/root,mattkretz/root,sirinath/root,mhuwiler/rootauto,lgiommi/root,mhuwiler/rootauto,thomaskeck/root,mkret2/root,mattkretz/root,root-mirror/root,pspe/root,arch1tect0r/root,arch1tect0r/root,krafczyk/root,esakellari/root,omazapa/root,sirinath/root,olifre/root,evgeny-boger/root,mattkretz/root,vukasinmilosevic/root,veprbl/root,omazapa/root,jrtomps/root,zzxuanyuan/root-compressor-dummy,Duraznos/root,perovic/root,sbinet/cxx-root,beniz/root,mkret2/root,veprbl/root,jrtomps/root,root-mirror/root,arch1tect0r/root,sbinet/cxx-root,georgtroska/root,gbitzes/root,mhuwiler/rootauto,Duraznos/root,sawenzel/root,karies/root,omazapa/root,smarinac/root,lgiommi/root,nilqed/root,zzxuanyuan/root,smarinac/root,karies/root,davidlt/root,georgtroska/root,jrtomps/root,zzxuanyuan/root,nilqed/root,dfunke/root,CristinaCristescu/root,agarciamontoro/root,evgeny-boger/root,abhinavmoudgil95/root,mattkretz/root,thomaskeck/root,gganis/root,nilqed/root,abhinavmoudgil95/root,omazapa/root,smarinac/root,buuck/root,BerserkerTroll/root,agarciamontoro/root,simonpf/root,olifre/root,0x0all/ROOT,abhinavmoudgil95/root,satyarth934/root,CristinaCristescu/root,sirinath/root,arch1tect0r/root,zzxuanyuan/root-compressor-dummy,dfunke/root,perovic/root,mkret2/root,abhinavmoudgil95/root,sbinet/cxx-root,smarinac/root,Y--/root,bbockelm/root,zzxuanyuan/root-compressor-dummy,root-mirror/root,0x0all/ROOT,nilqed/root,zzxuanyuan/root-compressor-dummy,BerserkerTroll/root,0x0all/ROOT,CristinaCristescu/root,perovic/root,krafczyk/root,vukasinmilosevic/root,perovic/root,abhinavmoudgil95/root,Duraznos/root,abhinavmoudgil95/root,0x0all/ROOT,evgeny-boger/root,evgeny-boger/root,davidlt/root,sawenzel/root,esakellari/my_root_for_test,Y--/root,georgtroska/root,vukasinmilosevic/root,gganis/root,jrtomps/root,georgtroska/root,jrtomps/root,mattkretz/root,omazapa/root-old,omazapa/root-old,gganis/root,davidlt/root,gbitzes/root,omazapa/root-old,sbinet/cxx-root,bbockelm/root,gganis/root,evgeny-boger/root,beniz/root,omazapa/root,sbinet/cxx-root,gbitzes/root,olifre/root,zzxuanyuan/root-compressor-dummy,nilqed/root,karies/root,gbitzes/root,Duraznos/root,gganis/root,georgtroska/root,arch1tect0r/root,pspe/root,gganis/root,Y--/root,beniz/root,gbitzes/root,zzxuanyuan/root,karies/root,perovic/root,zzxuanyuan/root,mattkretz/root,sawenzel/root,omazapa/root-old