Checkmk Werk 8980: docker_node_info: Support yet another output format

ID: 8980 Title: docker_node_info: Support yet another output format Component: Checks & agents Level: 1 Class: Bug fix Version: 1.7.0i1 The docker command line client version 19.03.1 has again changed the output format, resulting in several KeyErrors. Users who are using the mk_docker.py plugin shipped with Checkmk version 1.6 where not affected.