replace eval with ast.literal_eval
replace eval with ast.literal_eval

Closes #574

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