[openFATE 306656] Quick hack for anonymous read-only access to build service

Feature added by: Juergen Weigert (jnweiger) Feature #306656, revision 1 Title: Quick hack for anonymous read-only access to build service Hackweek IV: Unconfirmed Priority Requester: Important Requested by: Juergen Weigert (jnweiger) Description: Currently iChains is in front of build.opensuse.org, thus a read-only mode without login is not possible. As a quickfix hack: Let us implement a Guest User, who can login to iChains with one mouseclick. The Guest User shall have no write permissions, but shall have a login button, which allows user to change to their own login later. -- openSUSE Feature: https://features.opensuse.org/306656