aws json is not javascript style json. trailing comma breaks it :(

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
Merge pull request #6159 from SvenDowideit/s3-json-fixup

aws json is not javascript style json. trailing comma breaks it :(
pull only busybox:latest

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
fix busybox image detection

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)
Merge pull request #6165 from vieux/update_tests

Update tests regarding busybox & inspect