test: move net reconnect error test to sequential
The usage of common.PORT could cause undesired port collisions when run in parallel. The following test was moved to sequential. test-net-reconnect-error.js
Ref: nodejs#12376
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
test net