build-script: use a private sandbox for integration tests
build-script: use a private sandbox for integration tests

This does not solve all issues, see https://bugs.swift.org/browse/SR-321

Jnosh/swift,djwbrown/swift,amraboelela/swift,sschiau/swift,manavgabhawala/swift,hooman/swift,alblue/swift,shahmishal/swift,milseman/swift,gottesmm/swift,gottesmm/swift,glessard/swift,xedin/swift,djwbrown/swift,johnno1962d/swift,lorentey/swift,modocache/swift,slavapestov/swift,atrick/swift,felix91gr/swift,tardieu/swift,CodaFi/swift,arvedviehweger/swift,jmgc/swift,atrick/swift,frootloops/swift,sschiau/swift,CodaFi/swift,Jnosh/swift,manavgabhawala/swift,allevato/swift,IngmarStein/swift,benlangmuir/swift,shajrawi/swift,arvedviehweger/swift,gribozavr/swift,apple/swift,sschiau/swift,codestergit/swift,dduan/swift,jopamer/swift,johnno1962d/swift,calebd/swift,jckarter/swift,JaSpa/swift,OscarSwanros/swift,manavgabhawala/swift,tinysun212/swift-windows,xedin/swift,zisko/swift,aschwaighofer/swift,ken0nek/swift,jckarter/swift,codestergit/swift,calebd/swift,tinysun212/swift-windows,tinysun212/swift-windows,practicalswift/swift,glessard/swift,swiftix/swift,milseman/swift,xwu/swift,gregomni/swift,dduan/swift,roambotics/swift,JaSpa/swift,karwa/swift,lorentey/swift,gmilos/swift,djwbrown/swift,austinzheng/swift,arvedviehweger/swift,dduan/swift,tinysun212/swift-windows,uasys/swift,ahoppen/swift,apple/swift,harlanhaskins/swift,uasys/swift,tinysun212/swift-windows,practicalswift/swift,apple/swift,ken0nek/swift,russbishop/swift,russbishop/swift,shajrawi/swift,gribozavr/swift,calebd/swift,KrishMunot/swift,huonw/swift,IngmarStein/swift,gottesmm/swift,djwbrown/swift,glessard/swift,return/swift,aschwaighofer/swift,sschiau/swift,parkera/swift,deyton/swift,airspeedswift/swift,jtbandes/swift,gmilos/swift,Jnosh/swift,russbishop/swift,ken0nek/swift,karwa/swift,arvedviehweger/swift,alblue/swift,tkremenek/swift,kstaring/swift,apple/swift,shahmishal/swift,milseman/swift,JaSpa/swift,danielmartin/swift,adrfer/swift,milseman/swift,SwiftAndroid/swift,milseman/swift,benlangmuir/swift,amraboelela/swift,gottesmm/swift,jopamer/swift,alblue/swift,slavapestov/swift,CodaFi/swift,KrishMunot/swift,adrfer/swift,danielmartin/swift,sschiau/swift,devincoughlin/swift,kperryua/swift,parkera/swift,rudkx/swift,shahmishal/swift,kperryua/swift,airspeedswift/swift,johnno1962d/swift,felix91gr/swift,IngmarStein/swift,russbishop/swift,OscarSwanros/swift,hooman/swift,uasys/swift,austinzheng/swift,allevato/swift,frootloops/swift,modocache/swift,felix91gr/swift,ahoppen/swift,slavapestov/swift,danielmartin/swift,codestergit/swift,calebd/swift,SwiftAndroid/swift,natecook1000/swift,deyton/swift,jckarter/swift,danielmartin/swift,djwbrown/swift,kperryua/swift,arvedviehweger/swift,tjw/swift,glessard/swift,modocache/swift,huonw/swift,hooman/swift,harlanhaskins/swift,parkera/swift,hughbe/swift,atrick/swift,zisko/swift,KrishMunot/swift,apple/swift,allevato/swift,jopamer/swift,tardieu/swift,harlanhaskins/swift,JGiola/swift,ken0nek/swift,shahmishal/swift,jckarter/swift,tjw/swift,therealbnut/swift,lorentey/swift,natecook1000/swift,milseman/swift,swiftix/swift,aschwaighofer/swift,gribozavr/swift,milseman/swift,gmilos/swift,return/swift,airspeedswift/swift,ben-ng/swift,harlanhaskins/swift,shahmishal/swift,hooman/swift,IngmarStein/swift,gregomni/swift,tardieu/swift,natecook1000/swift,gregomni/swift,gregomni/swift,kperryua/swift,austinzheng/swift,manavgabhawala/swift,frootloops/swift,nathawes/swift,CodaFi/swift,tinysun212/swift-windows,hooman/swift,gmilos/swift,tkremenek/swift,gmilos/swift,brentdax/swift,arvedviehweger/swift,lorentey/swift,return/swift,kstaring/swift,dduan/swift,codestergit/swift,arvedviehweger/swift,practicalswift/swift,frootloops/swift,amraboelela/swift,huonw/swift,IngmarStein/swift,jckarter/swift,ken0nek/swift,JGiola/swift,kstaring/swift,KrishMunot/swift,felix91gr/swift,brentdax/swift,zisko/swift,harlanhaskins/swift,johnno1962d/swift,swiftix/swift,roambotics/swift,therealbnut/swift,manavgabhawala/swift,SwiftAndroid/swift,JaSpa/swift,roambotics/swift,zisko/swift,devincoughlin/swift,gmilos/swift,dreamsxin/swift,atrick/swift,return/swift,gribozavr/swift,rudkx/swift,karwa/swift,zisko/swift,amraboelela/swift,jmgc/swift,aschwaighofer/swift,stephentyrone/swift,ahoppen/swift,nathawes/swift,uasys/swift,glessard/swift,kperryua/swift,modocache/swift,shajrawi/swift,stephentyrone/swift,deyton/swift,CodaFi/swift,ken0nek/swift,jtbandes/swift,OscarSwanros/swift,zisko/swift,nathawes/swift,benlangmuir/swift,jopamer/swift,roambotics/swift,parkera/swift,xwu/swift,jmgc/swift,uasys/swift,practicalswift/swift,slavapestov/swift,xedin/swift,benlangmuir/swift,xedin/swift,apple/swift,bitjammer/swift,tardieu/swift,therealbnut/swift,therealbnut/swift,brentdax/swift,dreamsxin/swift,jmgc/swift,jckarter/swift,natecook1000/swift,gottesmm/swift,alblue/swift,amraboelela/swift,KrishMunot/swift,tardieu/swift,karwa/swift,shajrawi/swift,therealbnut/swift,dduan/swift,therealbnut/swift,stephentyrone/swift,modocache/swift,deyton/swift,JaSpa/swift,ken0nek/swift,tardieu/swift,bitjammer/swift,felix91gr/swift,hooman/swift,atrick/swift,xedin/swift,tinysun212/swift-windows,gribozavr/swift,tjw/swift,austinzheng/swift,codestergit/swift,nathawes/swift,JGiola/swift,sschiau/swift,johnno1962d/swift,hughbe/swift,kstaring/swift,bitjammer/swift,alblue/swift,gribozavr/swift,ben-ng/swift,practicalswift/swift,jmgc/swift,IngmarStein/swift,return/swift,bitjammer/swift,djwbrown/swift,hughbe/swift,hooman/swift,devincoughlin/swift,gottesmm/swift,xedin/swift,ahoppen/swift,SwiftAndroid/swift,devincoughlin/swift,allevato/swift,SwiftAndroid/swift,frootloops/swift,jopamer/swift,benlangmuir/swift,amraboelela/swift,ben-ng/swift,calebd/swift,JGiola/swift,stephentyrone/swift,return/swift,deyton/swift,Jnosh/swift,hughbe/swift,tardieu/swift,kstaring/swift,austinzheng/swift,gribozavr/swift,Jnosh/swift,kstaring/swift,karwa/swift,dduan/swift,xwu/swift,frootloops/swift,calebd/swift,zisko/swift,shahmishal/swift,SwiftAndroid/swift,ahoppen/swift,lorentey/swift,OscarSwanros/swift,ben-ng/swift,xwu/swift,karwa/swift,allevato/swift,tjw/swift,nathawes/swift,danielmartin/swift,jtbandes/swift,austinzheng/swift,uasys/swift,natecook1000/swift,stephentyrone/swift,gribozavr/swift,adrfer/swift,modocache/swift,therealbnut/swift,parkera/swift,roambotics/swift,jtbandes/swift,amraboelela/swift,natecook1000/swift,manavgabhawala/swift,xwu/swift,aschwaighofer/swift,danielmartin/swift,johnno1962d/swift,devincoughlin/swift,bitjammer/swift,shajrawi/swift,brentdax/swift,JGiola/swift,hughbe/swift,dduan/swift,codestergit/swift,kperryua/swift,devincoughlin/swift,huonw/swift,jtbandes/swift,KrishMunot/swift,uasys/swift,JGiola/swift,tkremenek/swift,gregomni/swift,hughbe/swift,lorentey/swift,benlangmuir/swift,parkera/swift,CodaFi/swift,gmilos/swift,adrfer/swift,OscarSwanros/swift,atrick/swift,Jnosh/swift,SwiftAndroid/swift,practicalswift/swift,felix91gr/swift,shahmishal/swift,xwu/swift,brentdax/swift,return/swift,russbishop/swift,gottesmm/swift,sschiau/swift,manavgabhawala/swift,adrfer/swift,felix91gr/swift,adrfer/swift,lorentey/swift,jmgc/swift,danielmartin/swift,shajrawi/swift,tjw/swift,OscarSwanros/swift,practicalswift/swift,tkremenek/swift,slavapestov/swift,johnno1962d/swift,swiftix/swift,slavapestov/swift,harlanhaskins/swift,bitjammer/swift,IngmarStein/swift,russbishop/swift,austinzheng/swift,deyton/swift,tkremenek/swift,nathawes/swift,ben-ng/swift,alblue/swift,huonw/swift,tkremenek/swift,codestergit/swift,rudkx/swift,devincoughlin/swift,shahmishal/swift,KrishMunot/swift,xwu/swift,jtbandes/swift,airspeedswift/swift,ben-ng/swift,aschwaighofer/swift,brentdax/swift,jopamer/swift,ben-ng/swift,ahoppen/swift,nathawes/swift,calebd/swift,swiftix/swift,alblue/swift,airspeedswift/swift,stephentyrone/swift,jmgc/swift,adrfer/swift,swiftix/swift,brentdax/swift,OscarSwanros/swift,tjw/swift,karwa/swift,rudkx/swift,stephentyrone/swift,tjw/swift,CodaFi/swift,hughbe/swift,gregomni/swift,airspeedswift/swift,tkremenek/swift,deyton/swift,djwbrown/swift,shajrawi/swift,rudkx/swift,kperryua/swift,lorentey/swift,shajrawi/swift,allevato/swift,slavapestov/swift,sschiau/swift,modocache/swift,huonw/swift,kstaring/swift,roambotics/swift,glessard/swift,allevato/swift,Jnosh/swift,JaSpa/swift,frootloops/swift,parkera/swift,karwa/swift,harlanhaskins/swift,xedin/swift,swiftix/swift,airspeedswift/swift,aschwaighofer/swift,jopamer/swift,devincoughlin/swift,natecook1000/swift,jtbandes/swift,JaSpa/swift,xedin/swift,rudkx/swift,parkera/swift,bitjammer/swift,jckarter/swift,russbishop/swift,practicalswift/swift,huonw/swift