Running pytest during Travis build fails with ModuleNotFoundError: No module named 'google'

[vduseev]

Summary

Running poetry run pytest fails during build because GCP dependencies are not installed.

How to reproduce

1. Clone repo
2. Install dependencies using poetry install -E yaml -E toml -E azure -E aws (just like in .travis.yml file)
3. Run poetry run pytest

====================================== test session starts =======================================
platform darwin -- Python 3.8.5, pytest-5.4.3, py-1.9.0, pluggy-0.13.1
rootdir: /Users/vduseev/Projects/python-configuration, inifile: setup.cfg
plugins: flake8-1.0.6, mock-2.0.0, mypy-0.4.2, cov-2.10.1, black-0.3.11
collected 200 items / 1 error / 199 selected                                                     

Running mypy on 30 files... done with status 1
Found 56 errors in 1 file (checked 30 source files)

============================================= ERRORS =============================================
___________________________ ERROR collecting tests/contrib/test_gcp.py ___________________________
ImportError while importing test module '/Users/vduseev/Projects/python-configuration/tests/contrib/test_gcp.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
tests/contrib/test_gcp.py:4: in <module>
    from google.api_core.exceptions import NotFound
E   ModuleNotFoundError: No module named 'google'

==================================== short test summary info =====================================
ERROR tests/contrib/test_gcp.py
!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
======================================== 1 error in 2.67s ========================================

What happens

1. google module cannot be imported because it is not installed.

What should happen

1. Successful import.

Fix suggestions

1. Add -E gcp to .travis.yml during dependency installation using poetry