Update python-django-auth-ldap to version 5.1.0 / rev 19 via SR 1248126
    
    https://build.opensuse.org/request/show/1248126
    by user dgarcia + dimstar_suse
    - Update to 5.1.0:
      * Allow importing the backend without loading apps by @francoisfreitag in #382 (Closes #380)
      * Drop support for EOL Python 3.8 by @francoisfreitag in #383
    - 5.0.0:
      * Breaking changes:
      An LDAPError during an LDAP search operation would cause the library
      to assume an empty result set.
    
      When mirroring groups, only a portion of a user groups would be
      mirrored. Allowing them to proceed with authentication may then break
      application access controls, as membership to a group (imagine an
      exclude group) would be missing.
    
      The library now systematically sends the ldap_error django signal. If
      an LDAPError occurs during an operation, the operation is aborted. In
      particular, when mirroring groups (LDAPUser._mirror_groups), an
      AuthenticationFailed might n