junitxml: use node.warn to ensure fslocations
junitxml: use node.warn to ensure fslocations

lukas-bednar/pytest,omarkohl/pytest,MengJueM/pytest,ddboline/pytest,hpk42/pytest,tomviner/pytest,JonathonSonesen/pytest,ropez/pytest,rmfitzpatrick/pytest,tomviner/pytest,etataurov/pytest,jaraco/pytest,The-Compiler/pytest,alfredodeza/pytest,JonathonSonesen/pytest,vmalloc/dessert,Bachmann1234/pytest,MichaelAquilina/pytest,txomon/pytest,pytest-dev/pytest,Bachmann1234/pytest,hackebrot/pytest,lukas-bednar/pytest,flub/pytest,eli-b/pytest,hpk42/pytest,vodik/pytest,MengJueM/pytest,userzimmermann/pytest,tareqalayan/pytest,malinoff/pytest,skylarjhdownes/pytest,ropez/pytest,pfctdayelise/pytest,RonnyPfannschmidt/pytest,The-Compiler/pytest,userzimmermann/pytest,vodik/pytest,markshao/pytest,Akasurde/pytest,nicoddemus/pytest,davidszotten/pytest,nicoddemus/pytest,omarkohl/pytest,tgoodlet/pytest