contrib: rework enable_experimental_docker_cli
contrib: rework enable_experimental_docker_cli

before this commit we were activating the feature in the wrong file.
config.json is the right one.

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

ceph/ceph-docker,ceph/ceph-docker