[MERGE] OPW 585231: edi: wait longer for parent transaction to complete

  Wait for parent transaction to complete by watching if it's parent cursor
  has been closed or not. For batch transaction (ex: confirming 50 invoices
  at once using 'Confirm Draft Invoices' wizard) that might take longer
  that 3 seconds! and we end up sending edi mail with old record values.

bzr revid: xal@openerp.com-20130228153034-6ttt05qzwoo02ah4