[openFATE 309105] LDAP authentification support

Feature changed by: Adrian Schröter (adrianSuSE) Feature #309105, revision 4 Title: LDAP authentification support - Buildservice: Candidate + Buildservice: Done Priority Requester: Important Projectmanager: Important Requested by: Adrian Schröter (adriansuse) Developer: David Greaves (dgreaves) Description: An LDAP server shall be usable for authentification and possibly also group management. Code has already been provided by Cray and Nokia. -- openSUSE Feature: https://features.opensuse.org/309105