pod: Store containers config when created from Pod
pod: Store containers config when created from Pod

In case some containers where created at Pod creation time, there
were not saved locally in config files. This led to some issues in
interacting with a container not created from container API.

Signed-off-by: Sebastien Boeuf <90b401417360b1924ef3f520ddee932686110f85@intel.com>

wcwxyz/virtcontainers,wcwxyz/virtcontainers,containers/virtcontainers,containers/virtcontainers,wcwxyz/virtcontainers