We noticed a regression since the 1.7.1 patch after some refactoring. This patch corrects the behavior and adds integration tests for modified manifest and rootfs layer blobs. Docker-DCO-1.1-Signed-off-by: Josh Hawn <josh.hawn@docker.com> (github: jlhawn) Upstream-commit: de52a3bcaa1742054be184cc3465f0933f6d383a Component: engine