adding a 5 LOC plugin for capturing and ignoring the output of test function calls

--HG--
branch : 1.0.x

contrib/pytest_ignoreout.py

@@ -0,0 +1,8 @@
+import py
+
+def pytest_runtest_call(item, __multicall__):
+    cap = py.io.StdCapture()
+    try:
+        return __multicall__.execute()
+    finally:
+        outerr = cap.reset()