ipa-client discovery with anonymous access off
    
    When RootDSE could be read (nsslapd-allow-anonymous-access set to
    "rootdse"), autodiscovery module failed to report success to the
    client installer.
    
    Remove faulty "verified_servers" flag from autodiscovery module as
    it has no point since we consider both scenarios (IPA server with
    anonymous access on and unknown LDAP server with anonymous access
    off) as success.
    
    https://fedorahosted.org/freeipa/ticket/3519