Suppressing HFZXDCAP real-time analysis if prior exit RC=8 (++HFZOPT2)

To suppress Z Abend Investigator real-time analysis via the HFZXDCAP pre-dump invocation exit, if a prior pre-dump exit has set RC=8 to suppress the dump, install the HFZOPT2 USERMOD.

To apply this USERMOD, edit and submit sample job HFZSOPT2.