Refactored the following aspects to be a rule applied by one aspect Enfo...

...rceInstanceLevelRulesAspectAttribute:

- FailNotCalledBaseEstablishContextAspectAttribute
- FailPrivateFieldCalledInNestedClassAspectAttribute
- FailTestFixtureWithoutTestAspectAttribute
- ProhibitGetOnNotInitializedPropertyAspectAttribute
- ProhibitSetOnInitializedPropertyAspectAttribute