Functional tests will now run inside the container running Pulp

The latest changes merged into plugin_template make the functional tests execute from inside the container that is running Pulp. This makes it more similar to how developers run tests in their environments.

Before you apply the latest plugin_template to your plugin, you shoud update the aiohttp_fixtures_origin value to in your template_config.yaml. If your tests don’t use pytest fixtures, this is not necessary. However, if you choose to use them in the future, you will need to make this change.