enable local authentication
At the moment local DSpace authentication is disabled because it didn't easily work when using the CLARIN WAYF Discofeed. It would be nice to enable this again to make the repository also usable for users that do not have a university (edugain) account.
related: auto-add users to groups
cf. https://wiki.lyrasis.org/display/DSPACE/Configuring+DSpace+and+Shibboleth (authentication.shib.role.
) and https://wiki.lyrasis.org/display/DSDOC6x/Authentication+Plugins
and maybe also look at auto-ip (https://github.com/ufal/clarin-dspace/pull/886). interesting: https://github.com/ufal/clarin-dspace/blob/clarin/dspace-api/src/main/java/org/dspace/authenticate/ShibAuthentication.java