* Add openpype_mongo command flag for testing.
* Revert back to TEST_OPENPYPE_MONGO
TEST_OPENPYPE_MONGO is placeholder used in all source test sip in `input/env_vars/env_var` not a env variable itself
* Fix openpype_mongo fixture
Fixture decorator was missing.
If value passed from command line should be used, it must come first as `env_var` fixture should already contain valid default Mongo uri.
* Renamed command line argument to mongo_url
---------
Co-authored-by: kalisp <petr.kalis@gmail.com>
e78b6065ac