test: add env name into test, and replace comons.fixtureDir with comm.fixtures

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• commit message follows [commit guidelines] (https://github.com/nodejs/node/blob/master/CONTRIBUTING.md#commit-message-guidelines)

Affected core subsystem(s)

test