[svn r63579] step one in simplifying runtest() collect() semantics
[svn r63579] step one in simplifying runtest() collect() semantics

--HG--
branch : trunk

JonathonSonesen/pytest,etataurov/pytest,abusalimov/pytest,bubenkoff/pytest,tareqalayan/pytest,Carreau/pytest,hpk42/pytest,mbirtwell/pytest,hunse/pytest,omarkohl/pytest,Haibo-Wang-ORG/pytest,ddboline/pytest,userzimmermann/pytest,ojake/pytest,mhils/pytest,markshao/pytest,chiller/pytest,vmalloc/dessert,rouge8/pytest,mdboom/pytest,chillbear/pytest,txomon/pytest,codewarrior0/pytest,untitaker/pytest,tgoodlet/pytest,wfxiang08/pytest,MengJueM/pytest,vodik/pytest,Bjwebb/pytest,Haibo-Wang-ORG/pytest,ropez/pytest,lukas-bednar/pytest,hpk42/pytest,tomviner/pytest,Bjwebb/pytest,RonnyPfannschmidt/pytest,ericdill/pytest,wfxiang08/pytest,icemac/pytest,ojake/pytest,mdboom/pytest,malinoff/pytest,nicoddemus/pytest,Magicjarvis/py,chiller/pytest,Bachmann1234/pytest,gabrielcnr/pytest,rmfitzpatrick/pytest,ionelmc/pytest,omarkohl/pytest,ghostsquad/pytest,mhils/pytest,ericdill/pytest,nicoddemus/pytest,MichaelAquilina/pytest,MengJueM/pytest,oleg-alexandrov/pytest,jaraco/pytest,pelme/pytest,inirudebwoy/pytest,doordash/pytest,pytest-dev/py,Bachmann1234/pytest,Akasurde/pytest,jb098/pytest,The-Compiler/pytest,pfctdayelise/pytest,rouge8/pytest,JonathonSonesen/pytest,icemac/pytest,bukzor/pytest,Carreau/pytest,oleg-alexandrov/pytest,ropez/pytest,inirudebwoy/pytest,eli-b/pytest,doordash/pytest,takluyver/pytest,gabrielcnr/pytest,pelme/pytest,skylarjhdownes/pytest,pytest-dev/pytest,nicoddemus/repo-test,chillbear/pytest,userzimmermann/pytest,mbirtwell/pytest,codewarrior0/pytest,takluyver/pytest,flub/pytest,hackebrot/pytest,alfredodeza/pytest,untitaker/pytest,vodik/pytest,tomviner/pytest,lukas-bednar/pytest,ionelmc/pytest,jb098/pytest,bukzor/pytest,hunse/pytest,The-Compiler/pytest,davidszotten/pytest,nicoddemus/repo-test,ghostsquad/pytest,abusalimov/pytest,bubenkoff/pytest