test(pytest): set python_path directly in pytest.ini

Previously the python_path used by pytest
was only defined in tox.ini that could be
a problem when pytest was run without tox.

This commit setup python_path directly in
the pytest configuration file.

Author: diodonfrost

pytest.ini

@@ -1,6 +1,7 @@
 [pytest]
 norecursedirs = .git .* *.egg* old docs dist build
 addopts = -p no:warnings
+python_paths = package/
 filterwarnings =
     # python3.4 raises this when importing setuptools
     ignore:The value of convert_charrefs will become True in 3.5.*:DeprecationWarning

tox.ini

@@ -7,14 +7,13 @@ skipsdist = True
 [testenv:pytest]
 basepython = python3
 skip_install = true
-setenv =
-    PYTHONPATH = package/
 deps =
     botocore==1.18.3
     boto3==1.15.3
     moto==1.3.16
     pytest==6.0.2
     pytest-cov==2.10.1
+    pytest-pythonpath==0.7.3
 commands =
     coverage run -m pytest tests/unit --cov package