[driver/s3aws] Update s3aws driver parameter parsing to match s3goamz
[driver/s3aws] Update s3aws driver parameter parsing to match s3goamz

Mirrors changes from #1414 into the newer driver

Signed-off-by: Brian Bland <5edcc1e68a17b4ff3b55c6007615b6004b1df064@docker.com>

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