Fix bug related to the teacher invitation when teacher not exists in the moocng and log with SAML
Fix bug related to the teacher invitation when teacher not exists in the moocng and log with SAML

GeographicaGS/moocng,GeographicaGS/moocng,GeographicaGS/moocng,OpenMOOC/moocng,OpenMOOC/moocng,GeographicaGS/moocng