Check_MK Werk 8131: Log errors of the RRD creation process into the cmc.log

ID: 8131 Title: Log errors of the RRD creation process into the cmc.log Component: cmc Level: 1 Class: New feature Version: 1.2.7i1 Previously this was optionally logged into an own logfile - and errors would only be logged if logging was enabled. Now errors are always present in <tt>cmc.log</tt>. Also the logging of the RRD creations will be visible in this logfile and not any longer in a separate log file.