Tiny fix finalizers and set min version of pytest (via #188)

Author: sseliverstov

allure-pytest/setup.py

@@ -26,7 +26,7 @@
 ]
 
 install_requires = [
-    "pytest>=2.7.3",
+    "pytest>=3.3.0",
     "six>=1.9.0",
     "allure-python-commons==2.2.4b1"
 ]

allure-pytest/src/listener.py

@@ -128,8 +128,9 @@ def pytest_fixture_setup(self, fixturedef, request):
                                                stop=now(),
                                                status=get_outcome_status(outcome),
                                                statusDetails=get_outcome_status_details(outcome))
-        finalizers = fixturedef._finalizer if hasattr(fixturedef, 'finalizer') else fixturedef._finalizers
-        for index, finalizer in enumerate(finalizers or ()):
+
+        finalizers = getattr(fixturedef, '_finalizers', [])
+        for index, finalizer in enumerate(finalizers):
             name = '{fixture}::{finalizer}'.format(fixture=fixturedef.argname, finalizer=finalizer.__name__)
             finalizers[index] = allure_commons.fixture(finalizer, parent_uuid=container_uuid, name=name)