Fold into Node Normalization update

[cbizon]

On an SRI call @cmungall suggested that this service and node normalization should be fed by the same pipeline. We should have a single ingest pipeline that takes in different vocabularies / ontologies, and collects xrefs or other identity assertions, labels and lexical synonyms, and keeps that all in some form. Could be RDF triples but doesn't really matter IMO.

Then that set of information can be e.g. the starting point for creating a name resolution service. But at that point, I think it makes sense to have a single service that has functions for both id and name lookup. Related to #4

[gaurav]

I think we've decided to keep node normalization and name resolution in different services, but with both being loaded from the same backend (Babel).

@cbizon Is there anything else that needs to be done here, or can we close this issue?