Check_MK Werk 8429: Fix exception 'format' on RRD creation of you have created RRD rules with the previous version

ID: 8429 Title: Fix exception 'format' on RRD creation of you have created RRD rules with the previous version Component: metrics Level: 2 Class: Bug fix Version: 1.4.0i1 If you had created some rules for RRD configuration of hosts or services then you would run into an exception with missing <tt>'format'</tt>. This has been fixed.