Occurrence search modified to use the latest Occurrence class.
RECORD_NUMBER filter supported
Merge branch 'master' of https://github.com/gbif/portal-web

# By Kyle Braak
# Via Kyle Braak
* 'master' of https://github.com/gbif/portal-web:
  Change updates portal following changes to Occurrence model object (see https://github.com/gbif/gbif-api/commit/d173dd55dbb4f1805fd0a587efcb20006c8bf468).
  Change fixes NPE.
  Change fixes broken verbatim occurrence page. Relates to POR-1661