Search index is missing short IDs for many ontologies

[mdorf]

Currently, our search index contains short IDs only for the ontologies whose terms include the "notation" attribute. It turns out that the "notation" attribute is not present in all ontologies and terms. Instead, the terms in these ontologies contain an equivalent field, called "prefixIRI" (added during the OWL API Wrapper (https://github.com/ncbo/owlapi_wrapper/) processing. The "prefixIRI" field is never indexed, thus resulting in failure of searches for short IDs on those ontologies.