To improve the output of module logging, we now include a path that
represents the modules that a context has passed through. This makes it
easy to tell if a log line came from a particular module hierarchy.
A helper function, `WithModule`, provides an easy way to mark a context
with a module and inject that module into the logger.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
We consolidate simple context logging for use across packages. For now,
one still needs logrus, but we can take this further and avoid the
import at a later time.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
