Add a proccess module to the common library

[conectado]

Describe the solution you'd like
I've been reading the Testing for internet and I've seen the function killChildren repeatedly defined over many files, such as test/internet/test-dgram-multicast-set-interface-lo.js and test/internet/test-dgram-broadcast-multi-process.js, and other similar patterns

Describe alternatives you've considered
I was wondering if it was a good idea to add a process module inside the common library so to not repeat code inside the tests. Otherwise we could add a Utils library.

Thanks!

[Trott]

Tests are the one place where it doesn't always make sense to keep could DRY. (See https://stackoverflow.com/q/6453235/436641 for example.) And this function is tiny. Abstracting it out does not gain us much. It appears in three tests.

I wouldn't stop it if someone wanted to do it, but I wouldn't bother.

[Trott]

(Actually, I probably would stop it. The test common module is a monolith that needs fewer things in it, not more.)

[conectado]

Makes sense, I will close the issue. Thanks again!