resolve path to fileDir before traversing it searching node_modules

[uwinkelvos]

fixes: #5102

[msftclas]

Hi @uwinkelvos, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!

This seems like a small (but important) contribution, so no Contribution License Agreement is required at this point. Real humans will now evaluate your PR.

TTYL, MSBOT;

[uwinkelvos]

i'll take a look at the test errors later.

[mhegazy]

@vladima had a fix for this that takes care of the failing tests. @vladima is this ready?

[mhegazy]

Thanks for the PR. #5275 should handle this case.