Fixes #1169

The unittest.skip decorator runs @functools.wraps on self._testcase. functools.wraps expects a "__name__" attribute and this patch adds one. It might not be the correct fix, but it works for me.

_pytest/unittest.py

@@ -134,6 +134,7 @@ class TestCaseFunction(pytest.Function):
         pass
 
     def runtest(self):
+        setattr(self._testcase, "__name__", self.name)
         self._testcase(result=self)
 
     def _prunetraceback(self, excinfo):