test: replace Function with Arrow Function to test-http-pause.js
This is part of Nodefest's Code and Learn nodejs/code-and-learn#72
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
test