This function returned the whole response, but we already handled the
warnings included in the response as part of the function. All consumers
of this function only used the container-ID, so let's simplify and return
just that (it's a non-exported func, so we can change the signature again
if we really need it).
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
23e26f40fe