PY-18926: Wrapping AttributeError

Nose has bug: instead of Test we are getting ContextSuite in case of error in setup class. It does not have attribute .test, so we wrap it try / except to mimic previous behavior (pre 5.0) when we simply did not check this field

python/testData/testRunner/env/nose/test1.py

@@ -1,4 +1,4 @@
-#from unittest import TestCase
+from unittest import TestCase
 
 class TestNose:
     def testOne(self):
@@ -9,3 +9,11 @@ class TestNose:
 
 def testThree():
     assert 4 == 2*2
+
+class FooTest(TestCase):
+
+    @classmethod
+    def setUpClass(self):
+        raise ValueError() # or any other bug
+    def test_test(self):
+        pass