clojure.spec Intermine web service

We should consider writing clojure.spec descriptions of the intermine API. This can be used for the following purposes, all across bluegenes, imcljs and im-tables-3.
- Validate that the Intermine instance is sending correct data
- Generate fake data for unit tests
- Should make it easy to write tests without having to rely on HTTP requests to a running Intermine instance

I think this would be worth revisiting in mid-to-late 2020, when clojure.spec2 is released and out of alpha phase.

Note: I will update this issue with more use cases I find.

Review the existing Intermine API usage across bluegenes, imcljs and im-tables-3, along with the issue's clojure.spec2 timing note. Define the API descriptions so responses can be validated and fake data can support unit tests without HTTP requests to a running Intermine instance.

Written by the indexing model from the issue text.