`AZURE_TEST_RUN_LIVE` needs to be set outside of `.env` during local testing

[scbedd]

I'm invoking tests locally. I have a .env defined. I defined AZURE_TESTS_RUN_LIVE=true within that .env. I am still getting playback cannot find recording file when it should be attempting record instead of default to playback.

If I set AZURE_TESTS_RUN_LIVE in environment, THEN run, the tests successfully go to record mode. We should be able to handle it when a .env exists and the user sets AZURE_TESTS_RUN_LIVE within only the .env.