Checkmk Werk 12706: ps section parser: crash on KeyError() when host is using busybox' ps implementation

ID: 12706 Title: ps section parser: crash on KeyError() when host is using busybox' ps implementation Component: Checks & agents Level: 1 Class: Bug fix Version: 2.1.0i1 Busybox' ps implementation does not provide the columns needed for the ps check, so the section parser crashes on missing colums (of which the first is 'user', resulting in KeyError(user). This change checks for the existence of all needed columns and aborts otherwise.