Don't fail on VersionID mismatch

[jbardin]

• If the registry isn't returning the same image that galaxy thinks should be running, then it's more likely that galaxy is running the wrong image.
• Remove the VersionID check from runtime.Stop so we can still stop any containers that may not have the right VersionID.
• Turn the fatal error in commander into a warning when the version don't match, so that the current image can be deployed.

[joeshaw]

:+1: