text: Title: [BUG] No module named 'reco_utils'
  Body: ### Description
  
  Error `No module named 'reco_utils'` in docker test
  
  https://github.com/microsoft/recommenders/tree/main/tools/docker
  
  ```
  $ docker run -it recommenders:cpu pytest tests/unit -m "not spark and not gpu and not notebooks"
  ImportError while loading conftest '/root/recommenders/tests/conftest.py'.
  tests/conftest.py:22: in <module>
      from reco_utils.common.constants import (
  E   ModuleNotFoundError: No module named 'reco_utils'
  ```
  
  
  ### In which platform does it happen?
  
  Linux  cpu docker
  
  