Update debug levels in sss_semanage_error_callback
    
    Switch to using new debug levels in sss_semanage_error_callback.
    Make SEMANAGE_MSG_WARN map to SSSDBG_MINOR_FAILURE instead of
    SSSDBG_CONF_SETTINGS as it suits it better.
    
    This prepares the function for removal of old debug level support.
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
    Reviewed-by: Stephen Gallagher <sgallagh@redhat.com>
    Reviewed-by: Simo Sorce <simo@redhat.com>
    (cherry picked from commit cb637a64fc51d6f4c718f75e23b19df6bdfe1c51)