Restore ability to perform recursive definition search

[spider-mane]

This pull request maintains the newly added behavior of returning a string when when the concrete value is derived from a non-class alias while restoring the ability to resolve definitions recursively. Removing or limiting recursive resolution resulted in unresolvable definitions that were previously valid. The test has also been renamed to better reflect the expected behavior as well as added to DefinitionTest since the behavior exists on the Definition class.