[Python] Updates python test framework to pytest (#4765)

* Switches python generators to use pytest, useNose CLI option added if to allow nose to be used instead

* Adds ensure-up-to-date changes

* Adds setup.cfg to python clients so we can configure nose when useNose=true

* Adds fix for python-aiohttp testing, adds files missing from ensure-up-to-date

samples/client/petstore/python-asyncio/.gitignore

@@ -45,7 +45,9 @@ coverage.xml
 *,cover
 .hypothesis/
 venv/
+.venv/
 .python-version
+.pytest_cache
 
 # Translations
 *.mo

samples/client/petstore/python-asyncio/dev-requirements.txt

@@ -1,4 +1,2 @@
 tox
-coverage
-randomize
 flake8

samples/client/petstore/python-asyncio/setup.cfg

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length=99

samples/client/petstore/python-asyncio/test-requirements.txt

@@ -1,5 +1,3 @@
-pytest>=3.6.0
-pytest-cov>=2.6.1
-pluggy>=0.3.1
-py>=1.4.31
-randomize>=0.13
+pytest~=4.6.7 # needed for python 2.7+3.4
+pytest-cov>=2.8.1
+pytest-randomly==1.2.3 # needed for python 2.7+3.4

samples/client/petstore/python-asyncio/test_python3.sh

@@ -18,7 +18,6 @@ fi
 
 ### install dependencies
 pip install -r $REQUIREMENTS_FILE | tee -a $REQUIREMENTS_OUT
-python setup.py develop
 
 ### run tests
 tox || exit 1

samples/client/petstore/python-asyncio/tox.ini

@@ -6,4 +6,4 @@ deps=-r{toxinidir}/requirements.txt
      -r{toxinidir}/test-requirements.txt
 
 commands=
-   pytest -v --cov petstore_api
+   pytest --cov=petstore_api