Checkmk Werk 10584: docker_container_mem: consider caches and drop zero metrics

ID: 10584 Title: docker_container_mem: consider caches and drop zero metrics Component: Checks & agents Level: 1 Class: Bug fix Version: 1.7.0i1 Previously the caches where not taken into account correctly, this has been fixed. Users might observe a slight drop in the used memory metric. In addition, the swap metric is no longer produced, as it allways reported zero.