VIVO-799: only display individuals with rdfs labels in custom form picklists
Merge branch 'maint-rel-1.7' of https://github.com/vivo-project/Vitro into maint-rel-1.7
VIVO-801 Move RDB migrator from VIVO to Vitro

Older instances of Vitro might want to use it.
Merge branch 'maint-rel-1.7' into develop