0ec41ab ldap: refactor check_pwexpire_kerberos to use util func

2 files Authored by preichl 9 years ago, Committed by jhrozek 9 years ago,
    ldap: refactor check_pwexpire_kerberos to use util func
    
    Refactor check_pwexpire_kerberos() to use utility function
    sss_utc_to_time_t().
    
    Modify test to handle new error code ERR_TIMESPEC_NOT_SUPPORTED
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>