Correct setup.cfg for new py.test syntax

Signed-off-by: Philippe Ombredanne <pombredanne@nexb.com>

Author: pombredanne

setup.cfg

@@ -5,7 +5,7 @@ license_file = NOTICE
 pypi_release = clean --all sdist --formats=bztar bdist_wheel register upload
 release = clean --all sdist --formats=bztar,zip bdist_wheel
 
-[pytest]
+[tool:pytest]
 norecursedirs =
     .git
     bin
@@ -31,6 +31,7 @@ norecursedirs =
     tmp
     src/*/data
     tests/*/data
+    etc/scripts/testdata
 
 python_files = *.py