Logs going to system journal in Ubuntu instead of log files

I've had this reported from several community members and have been able to reproduce myself. On a single-server Ubuntu 16.04 setup the ColumnStore logs are going into the system journal instead of the files in /usr/local/mariadb/columnstore.

I believe the reason is during postConfigure syslog is restarted several times rapidly. Ubuntu's systemd says this is happening too often and we end up with syslog not starting at all. The log data then falls back to the system journal.