f28ab6e LDAP: Errors retrieving the RootDSE should not be fatal

Authored and Committed by sgallagh 7 years ago
    LDAP: Errors retrieving the RootDSE should not be fatal
    
    If we can't reach the RootDSE, let's just proceed as if it's
    unavailable with reasonable defaults. If we fail later on, that's
    fine.
    
    Fixes https://fedorahosted.org/sssd/ticket/1257