SUSE-SU-2019:0426-1 Security update for systemd

This update for systemd fixes the following issues: - CVE-2019-6454: Overlong DBUS messages could be used to crash systemd bsc1125352 - units: make sure initrd-cleanup.service terminates before switching to rootfs bsc1123333 - logind: fix bad error propagation - login: log session state 'closing'...