Extend submit_for_inference to work correctly with hi-ml as submodule

[ant0nsc]

Check if we need to extend submit_for_inference to work correctly when hi-ml is not available as a package

Originally posted by @ant0nsc in #564 (reply in thread)

@furtheraway, It appears your conda environment does not yet have the required packages. You can try two things: 
* `pip install hi-ml-azure`
* Alternatively, look at the code at the start of `runner.py`, that adds the paths to the git submodules that contain `health_ml`. Copy those bits into `submit_for_inference`.

AB#5215