Trac Ticket #345 - db deadlock return should not log error
1) In the ldbm_entryrdn.c, error log level is set to
SLAPI_LOG_BACKLDBM if DB_LOCK_DEADLOCK is returned
from the BDB operations, otherwise set to SLAPI_LOG_FATAL.
2) If DB_LOCK_DEADLOCK is returned in the entryrdn functions,
retry the BDB operations up to RETRY_TIMES.
3) The log level of ACLSUMMARY and the one of BACKLDBM were
confused. It was fixed in log.c.
Reviewed by Rich (Thanks!!)