NMS-6828 giving up on VacuumdTest

It would take WAY too much work to rearchitect Vacuumd to be
properly testable.  We've gone so far into code debt that after
a vote, we've decided to declare code bankruptcy.
Merge remote-tracking branch 'origin/1.12'

Conflicts:
	opennms-alarms/daemon/src/test/java/org/opennms/netmgt/vacuumd/VacuumdTest.java