StorageDriver GCS: try google.DefaultTokenSource first
StorageDriver GCS: try google.DefaultTokenSource first

Signed-off-by: Arthur Baars <615193f904a227a9cebf5ad3042a37668b81f4c6@semmle.com>

RichardScothern/distribution,docker/docker.github.io,denverdino/docker.github.io,bdwill/docker.github.io,miminar/distribution,joeuo/docker.github.io,docker/docker.github.io,jzwlqx/denverdino.github.io,sebrandon1/distribution,LuisBosquez/docker.github.io,denverdino/docker.github.io,denverdino/docker.github.io,joaofnfernandes/docker.github.io,johnstep/docker.github.io,sanscontext/docker.github.io,dmcgowan/distribution,runcom/distribution,jwhonce/distribution,menglingwei/denverdino.github.io,genedock/distribution,shin-/docker.github.io,menglingwei/denverdino.github.io,anweiss/docker.github.io,schu/distribution,troy0820/docker.github.io,alexisbellido/docker.github.io,BSWANG/denverdino.github.io,aduermael/docker.github.io,yuwaMSFT2/distribution,LuisBosquez/docker.github.io,docker-zh/docker.github.io,bdwill/docker.github.io,BrickXu/distribution,sanscontext/docker.github.io,denverdino/denverdino.github.io,aaronlehmann/distribution,aduermael/docker.github.io,menglingwei/denverdino.github.io,konstruktoid/distribution,joaofnfernandes/docker.github.io,BSWANG/denverdino.github.io,jwhonce/distribution,BSWANG/denverdino.github.io,jzwlqx/denverdino.github.io,liubin/distribution,shubheksha/docker.github.io,thaJeztah/docker.github.io,bdwill/docker.github.io,aaronlehmann/distribution,aduermael/docker.github.io,vdemeester/distribution,johnstep/docker.github.io,liubin/distribution,menglingwei/denverdino.github.io,phiroict/docker,konnase/distribution,danix800/docker.github.io,dobril-stanga/distribution,thaJeztah/distribution,xiekeyang/distribution,phiroict/docker,BrianBland/distribution,shin-/docker.github.io,danix800/docker.github.io,thaJeztah/distribution,mattrgreen/distribution,londoncalling/docker.github.io,estesp/distribution,konnase/distribution,docker/distribution,Seb-Solon/distribution,londoncalling/docker.github.io,shin-/docker.github.io,JimGalasyn/docker.github.io,jzwlqx/distribution,gdevillele/docker.github.io,gdevillele/docker.github.io,Seb-Solon/distribution,denverdino/denverdino.github.io,yuwaMSFT2/distribution,LuisBosquez/docker.github.io,stevvooe/distribution,manoj535/distribution,londoncalling/docker.github.io,mikebrow/distribution,jlhawn/distribution,shin-/docker.github.io,spacexnice/distribution,docker-zh/docker.github.io,kmala/distribution,stevvooe/distribution,JimGalasyn/docker.github.io,joaofnfernandes/docker.github.io,mattrgreen/distribution,alexisbellido/docker.github.io,JimGalasyn/docker.github.io,docker-zh/docker.github.io,joeuo/docker.github.io,shin-/docker.github.io,moxiegirl/distribution,denverdino/docker.github.io,kmala/distribution,jzwlqx/denverdino.github.io,aduermael/docker.github.io,dobril-stanga/distribution,denverdino/denverdino.github.io,docker/distribution,anweiss/docker.github.io,joaofnfernandes/docker.github.io,LuisBosquez/docker.github.io,nwt/distribution,rillig/docker.github.io,gdevillele/docker.github.io,rbarlow/distribution,manoj535/distribution,docker-zh/docker.github.io,hopkings2008/distribution,menglingwei/denverdino.github.io,miminar/distribution,sadlil/distribution,spacexnice/distribution,joaofnfernandes/docker.github.io,anweiss/docker.github.io,gdevillele/docker.github.io,JimGalasyn/docker.github.io,deis/distribution,denverdino/docker.github.io,cezarsa/distribution,shubheksha/docker.github.io,denverdino/denverdino.github.io,rillig/docker.github.io,harrisonfeng/distribution,bdwill/docker.github.io,docker-zh/docker.github.io,docker/docker.github.io,cyli/distribution,alexisbellido/docker.github.io,londoncalling/docker.github.io,shubheksha/docker.github.io,denverdino/denverdino.github.io,jzwlqx/denverdino.github.io,rillig/docker.github.io,troy0820/docker.github.io,danix800/docker.github.io,docker/docker.github.io,sergeyfd/distribution,aprajshekhar/distribution,nwt/distribution,gdevillele/docker.github.io,troy0820/docker.github.io,cezarsa/distribution,LuisBosquez/docker.github.io,mikebrow/distribution,estesp/distribution,huamai-io/distribution,shyr/distribution,rillig/docker.github.io,thaJeztah/docker.github.io,harrisonfeng/distribution,docker/docker.github.io,shubheksha/docker.github.io,moxiegirl/distribution,johnstep/docker.github.io,xiekeyang/distribution,dmcgowan/distribution,vdemeester/distribution,jzwlqx/distribution,BSWANG/denverdino.github.io,deis/distribution,konstruktoid/distribution,noxiouz/distribution,anweiss/docker.github.io,RichardScothern/distribution,phiroict/docker,mbentley/distribution,thaJeztah/docker.github.io,troy0820/docker.github.io,bdwill/docker.github.io,joeuo/docker.github.io,jlhawn/distribution,jzwlqx/denverdino.github.io,andrewnguyen/distribution,duglin/distribution,noxiouz/distribution,genedock/distribution,BrickXu/distribution,phiroict/docker,alexisbellido/docker.github.io,JimGalasyn/docker.github.io,phiroict/docker,johnstep/docker.github.io,cyli/distribution,alexisbellido/docker.github.io,aprajshekhar/distribution,sadlil/distribution,BrianBland/distribution,danix800/docker.github.io,runcom/distribution,joeuo/docker.github.io,johnstep/docker.github.io,sergeyfd/distribution,duglin/distribution,sanscontext/docker.github.io,londoncalling/docker.github.io,joeuo/docker.github.io,mbentley/distribution,andrewnguyen/distribution,sanscontext/docker.github.io,sebrandon1/distribution,hopkings2008/distribution,BSWANG/denverdino.github.io,huamai-io/distribution,schu/distribution,rbarlow/distribution,shubheksha/docker.github.io,shyr/distribution,thaJeztah/docker.github.io,sanscontext/docker.github.io,thaJeztah/docker.github.io,anweiss/docker.github.io