Spec: Container runtime shall tear down namespaces
Spec: Container runtime shall tear down namespaces

Explicitly state that the container runtime, not the plugin, shall tear
down network namespaces.

Signed-off-by: Andreas Karis <cc0a47ed7a3740eaec65f6f21c039e9417e3fc87@gmail.com>

appc/cni,containernetworking/cni,containernetworking/cni,appc/cni