45168: CLOUD-1140: Activities PostLookup : "Skipping activity post 1234567"and occasionally "Exception during update of posts" (due to InvalidNodeRefException) - see also ALF-16739
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@45974 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261