With GoAssociation refactorings, ensure functionality of AssocParser and report mechanisms

[dougli1sqrd]

For https://github.com/biolink/ontobio/issues/402, https://github.com/biolink/ontobio/issues/403, and https://github.com/biolink/ontobio/issues/295, we will need to ensure that AssocParser is functional the entire way through, as well as the report systems.

I suspect given how we've drawn the lines in this initial refactoring thrust that there should be minimal affect on the above systems, but for anything that does need to be changed, this is sort the catch-all ticket for those parts of the ontobio system.