Set log_size_max for podman
We run kube*, etcd and heat-container-agent with podman. We need to move from libpod.conf to containers.conf
Keep the limit to 50M.
Change-Id: Id0a6a2b453f2ad28696783a41c184d6d526d8a66 Signed-off-by: Spyros Trigazis spyridon.trigazis@cern.ch