test: add an indicator `isIBMi`
We have to skip some test cases on IBM i.
On IBM i, process.platform
and os.platform()
both return aix
,
It is not enough to differentiate between IBM i and real AIX system.
Also updated parallel/test-cluster-bind-privileged-port.js for test.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
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