HEEDLS-360 Disallow admin registration if centre has CentreManager admin#486

ibrahimmunir14 merged 1 commit intomasterTechnologyEnhancedLearning/DLSV2:masterfrom

HEEDLS-360-admin-registration--fixTechnologyEnhancedLearning/DLSV2:HEEDLS-360-admin-registration--fixCopy head branch name to clipboard