Fix Enum.__member__ regression tests

Ref pylint-dev/astroid#940. These tests failed after fixing inference of
Enum.__members__ due to unexpected "not-iterable" warnings raised. These
warnings were not false-positives, as the test definition would have
raised TypeError at runtime: .keys and .values on dict/mappingproxy
are not properties, but methods.

tests/functional/m/member/member_checks.py

@@ -227,7 +227,7 @@ class Animal(Enum):
 # To test false positive no-member on Enum.__members__.items()
 for itm in Animal.__members__.items():
     print(itm)
-for keyy in Animal.__members__.keys:
+for keyy in Animal.__members__.keys():  # pylint: disable=consider-iterating-dictionary
     print(keyy)
-for vall in Animal.__members__.values:
+for vall in Animal.__members__.values():
     print(vall)