Fixed node tests that were hiding a NullPointerException when node associations weren't found
Fixed NodeAssoc AssociationRef caching for cases where the source or target nodes move stores
Removed storage of Path property for archived nodes
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2886 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261