Allow uploading tokens without realm assigning
Allow uploading tokens without realm assigning

When upload a token file you do not need to assign
a realm to the tokens.

Closes #229

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