1) In ejb-jar.xml : we have modified the value of boolean parameters 
param/SendCompletedOrderMail, param/SendApprovalMail and param/SendConfirmationMail	
to allow the send of email.

2) In ejb-jar.xml : We have modified the transactionnal attribute for OrderApprovalMDB.
	We have put NotSupported because WebServices cannot propagate transactionnal context.