Hotfix: the list_occs_associated routine was not properly checking for ref_id and other filters. Now it is.
Hotfix: the list_occs_associated routine was not properly checking for
ref_id and other filters. Now it is.

paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new