avoid throwing error for some classes for the LUI converter

[sergiocontrino]

various classes give error of the kind shown below.
for some we probably should add the relevant configuration, but for some (author? location?) we should maybe not throw an error?

[2020-12-23 10:35:31] [info] 2020-12-23 10:35:31,797 [http-nio-8080-exec-25519] ERROR (InterMineLUIConverter,124) - Failed to get identifier fot the entity with id: 1161154
[2020-12-23 10:35:31] [info] ]java.lang.IllegalAccessException: Couldn't get field "[interface org.intermine.model.bio.Location].primaryIdentifier" (available fields are [dataSets, end, feature, id, locatedOn, start, strand])