Use types instead of special objects (see also #988)

jedi/evaluate/compiled/__init__.py

@@ -576,9 +576,9 @@ def _a_generator(foo):
 
 
 _SPECIAL_OBJECTS = {
-    'FUNCTION_CLASS': type(load_module),
+    'FUNCTION_CLASS': types.FunctionType,
     'METHOD_CLASS': type(CompiledObject.is_class),
-    'MODULE_CLASS': type(os),
+    'MODULE_CLASS': types.ModuleType,
     'GENERATOR_OBJECT': _a_generator(1.0),
     'BUILTINS': _builtins,
 }