rhel8: options disp_qos and dispatcher for auditd were deprecated

Issue

• Parameters for auditd (disp*) which were used in RHEL7 do not exist in RHEL8 onwards.
• We added the following 2 lines to/etc/audit/auditd.conf:

disp_qos = lossless
dispatcher = /sbin/audispd

..and then restarted auditd.service. Later, the following messages were observed in /var/log/messages:

auditd[PID]: The disp_qos option is deprecated - line 41
auditd[PID]: The dispatcher option is deprecated - line 42