tox.ini: Pass posargs to make "tox -e py27 path.to.test" work

Signed-off-by: YAMAMOTO Takashi <[email protected]>
Signed-off-by: FUJITA Tomonori <[email protected]>

Author: yamt

tox.ini

@@ -6,7 +6,7 @@ deps = -U
        -r{toxinidir}/tools/pip-requires
        -r{toxinidir}/tools/test-requires
 commands =
-  python ryu/tests/run_tests.py
+  python ryu/tests/run_tests.py '{posargs}'
 
 [testenv:pep8]
 commands =