test: add hasFipsCrypto to test/common.js

Utility function for tests to check if OpenSSL is using
a FIPS verified cryptographic provider.

PR-URL: https://github.com/nodejs/node/pull/3756


Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: Shigeki Ohtsu <ohtsu@iij.ad.jp>
Reviewed-By: James M Snell <jasnell@gmail.com>