KNL-515 and KNL-517 - Upgrade Spring to 3.2.3 and Hibernate to 3.6.1

Mega merge of https://github.com/botimer/sakai-cle/tree/spring-32



git-svn-id: https://source.sakaiproject.org/svn/calendar/trunk@125281 66ffb92e-73f9-0310-93c1-f5514f145a0a