chore(pytest): move config to setup.cfg (DataDog#3586)

* chore(pytest): move config to setup.cfg

tox.ini is an odd place for it

* apparently have to use tool:pytest section

setup.cfg

@@ -26,3 +26,19 @@ ignore = W503,E231,A003,G201,D100,D101,D102,D103,D104,D105,D106,D107,D200,D202,D
 enable-extensions=G
 rst-roles = class,meth,obj,ref,func
 rst-directives = py:data
+
+# DEV: We use `conftest.py` as a local pytest plugin to configure hooks for collection
+[tool:pytest]
+# --cov-report is intentionally empty else pytest-cov will default to generating a report
+addopts =
+  --cov=ddtrace/
+  --cov=tests/
+  --cov-append
+  --cov-report=
+  --durations=10
+  --junitxml=test-results/junit.xml
+# DEV: The default is `test_*\.py` which will miss `test.py` files
+python_files = test*\.py
+filterwarnings =
+    # Show any DeprecationWarnings once
+    once::DeprecationWarning

tox.ini

@@ -264,13 +264,3 @@ deps=
 
 # this is somewhat flaky (can fail and still be up) so try the tests anyway
 ignore_outcome=true
-
-# DEV: We use `conftest.py` as a local pytest plugin to configure hooks for collection
-[pytest]
-# --cov-report is intentionally empty else pytest-cov will default to generating a report
-addopts = --cov=ddtrace/ --cov=tests/ --cov-append --cov-report= --durations=10 --junitxml=test-results/junit.xml
-# DEV: The default is `test_*\.py` which will miss `test.py` files
-python_files = test*\.py
-filterwarnings =
-    # Show any DeprecationWarnings once
-    once::DeprecationWarning