Add absolute_import failing SSCCE, and get pytest to ignore it

test/absolute_import/unittest.py

@@ -0,0 +1,13 @@
+"""
+This is a module that shadows a builtin (intentionally).
+
+It imports a local module, which in turn imports stdlib unittest (the
+name shadowed by this module). If that is properly resolved, there's
+no problem. However, if jedi doesn't understand absolute_imports, it
+will get this module again, causing infinite recursion.
+"""
+from local_module import Assertions
+
+class TestCase(Assertions):
+    def test(self):
+        self.assertT