- properly reconnect after ftp connection time outs between large files
  - XmlMarcClient sends deletes by record instead of by ID to storage
  - XmlMarcClient detects deletes by LEADER 05 (status) instead of 06 (type)
  - stop printing each binary MARC file to system.out
  - remove un/pw from logged ftp URLs

  Also fixes name of holdings records metrics (should be HOLDING_RECORD now)