cs fixes
getting the referenced nodes from a property no longer can index the target by uuid
Merge pull request #583 from doctrine/adjust-to-jackalope-cleanups

getting the referenced nodes from a property no longer can index the target by uuid
Failing test case: proxy loading fails when objects referencing each other are loaded by the same `UnitOfWork#findMany()` call
Asserting also on node name for clarity, simplifying tests, readability fixes
Applying hotfix: currently existing identifiers are used to check against the identity map during hydration of multiple hierarchical items referencing each other
Rewording test variables for clarity
Retrieved document instance should be the same one that is already in the identity map
s/Comment// on `ParentTestObj` identifiers in tests, for clarity
#581 - s/parentComment/parent