dns: suppress stderr from journalctl in "nmlog-parse-dnsmasq.sh" script
journalctl can print to stderr:
Journal file /var/log/journal/aeeddd08f4334901bca6efe5d10df607/user-1001.journal is truncated, ignoring file.
which breaks the "Then device "eth2" has DNS server "172.16.1.53"" step.