fix bug to allow --import-plugin to work

[Adam-D-Lewis]

Reference Issues or PRs

nebari --import-plugin path/to/plugin.py <command> ...
nebari --import-plugin import.module.plugin.path <command> ...

as explained in the instructions in https://www.nebari.dev/docs/how-tos/nebari-extension-system#installing-a-plugin don't work currently. This fixes that error.

What does this implement/fix?

Put a x in the boxes that apply

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features not to work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe):

Testing

• Did you test the pull request locally?
• Did you add new tests?

How to test this PR?

• Clone git@github.com:Quansight/nebari-mlflow-plugin.git locally
• run nebari init -p 'myproject' on main branch of nebari repo
• add the following to the nebari config file

mlflow:
  enabled: false

• run nebari --import-plugin <your-path-to-repo>/nebari-mlflow-plugin/src/nebari_mlflow_plugin/__init__.py deploy -c nebari-config.yaml. You'll get an error saying extra config in MLflow is not supported.
• Do the same thing but on this branch and deployment will start.

Any other comments?

[marcelovilla]

Thanks @Adam-D-Lewis! Just tested this and works as expected 🚀