Log file rotation changed (#634557)

The rotation settings for the log files have been changed. Previously, a size-rotating-file-handler was used by default. Now, a periodic-size-rotating-file-handler is used. This means that the rotation now depends both on the date and the file size. By default, a new log file is created every day and the maximum file size is 50MB. If the maximum size is exceeded, a new file is created for this day. 10 files are kept as backup.

The XML configuration files cm6-<DB>.xml, cm6-cmrf-<DB>.xml, cmrf-<DB>.xml and the new file cm6-dwh-<DB>.xml have been modified accordingly.