Added cleanup job for content stores
- content is moved into (alf_data)/contentstore.deleted and mirrors the live content store
- We'll make a call about disabling the trigger for the job, but currently it will fire at 4am
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2422 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261