Actually look inside the container to see if the secret data is present
and correct. Test absolute paths, relative paths, and just a basename.
Test the scenario where a service references the same secret under
different targets.
Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
Upstream-commit: 0da7bd0314a61919428fe036660b822b0bf22d35
Component: engine