Added updater to update the existing Student models with the school_type entry.
Added updater to update the existing Student models with the school_type entry.

Reviewed by: Lennard de Rijk

SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange,SRabbelier/Melange