8bc6bc6 DP: Drop dp_pam_err_to_string

Authored and Committed by jhrozek 5 years ago
    DP: Drop dp_pam_err_to_string
    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>