Mark mandatory attributes in mapping of resolvers
Mark mandatory attributes in mapping of resolvers

Closes #332

jh23453/privacyidea,jalr/privacyidea,privacyidea/privacyidea,wheldom01/privacyidea,jh23453/privacyidea,privacyidea/privacyidea,jalr/privacyidea,wheldom01/privacyidea,jh23453/privacyidea,jalr/privacyidea,privacyidea/privacyidea,wheldom01/privacyidea,jalr/privacyidea,jalr/privacyidea,wheldom01/privacyidea,privacyidea/privacyidea,wheldom01/privacyidea,privacyidea/privacyidea,wheldom01/privacyidea,jalr/privacyidea,privacyidea/privacyidea,jh23453/privacyidea,jh23453/privacyidea,jh23453/privacyidea