Ticket 48978 - refactor LDADebug() to slapi_log_err()
Description: Refactor LDAPDebug() & slapi_log_error() to slapi_log_err().
slapi_err_log() is a macro function that can be undefined for
performance testing.
Also removed ldaplog.h which contained all the old LDAPDebug
macro functions.
https://fedorahosted.org/389/ticket/48978
Reviewed by: wibrown & nhosoi(Thanks!!)