Fix for bug where user had multiple identical associations with organisations via user_org_role
Fix for bug where user had multiple identical associations with organisations via user_org_role

Fix will stop this happening in future; does not clean up data.

DigitalCurationCentre/DMPonline_v4,BibNumUMontreal/DMPonline_v4,cau-vfu/DMPonline_v4,BibNumUMontreal/DMPonline_v4,DigitalCurationCentre/DMPonline_v4,DigitalCurationCentre/DMPonline_v4,cau-vfu/DMPonline_v4,BibNumUMontreal/DMPonline_v4,cau-vfu/DMPonline_v4