[bug] DEFAULT_FILE_STORAGE environment var not always respected

[dkliban]

Idiscovered a new bug in Pulp that i believe might be a dynaconf issue. The issue revolves around DEFAULT_FILE_STORAGE setting. In our codebase we have the following import from django.core.files.storage import default_storage . When DEFAULT_FILE_STORAGE is set in settings.py, default_storage reports it correctly. If we set PULP_DEFAULT_FILE_STORAGE as an environment variable, the default_storage does not reflect the value of the env var. At the same time dynaconf list reports the correct value set in the env var.