install inference and test user groups defined in the defaultGraph

configure Fuseki to have inference engine on defaultGraph
then test that `rdfs:subPropertyOf vcard:hasMember` works properly in evaluator (make some more unit tests)

Start by locating the Fuseki/defaultGraph configuration and the evaluator's unit tests. Enable inference for the defaultGraph, then add tests confirming that `rdfs:subPropertyOf vcard:hasMember` works properly for user groups; done means the configuration works and the evaluator tests pass.

Written by the indexing model from the issue text.