test: revert changes to test/parallel/test-cluster-dgram-1.js
Checklist
-
make -j4 test
(UNIX), orvcbuild test nosign
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
cluster
Description of change
We've started to see frequent failures in test/parallel/test-cluster-dgram-1.js on AIX since the refactoring in https://github.com/nodejs/node/pull/8261. Revert changes until we have time to investigate properly.