b51ed15 DP: Drop dp_pam_err_to_string

Authored and Committed by jhrozek 5 years ago
    DP: Drop dp_pam_err_to_string
    
    Resolves:
        https://fedorahosted.org/sssd/ticket/2861
    
    All back end requests were using pam_strerror() to print additional info
    about why request failed. Since pam_strerror() returns localized message
    and we don't know the locale beforehand, this message failed to be
    transferred through D-Bus, resulting in a crash.
    
    Reviewed-by: Sumit Bose <sbose@redhat.com>
    (cherry picked from commit 8bc6bc6d87127d615f7a81d7151cb46007feff63)