conpaas-director: add osd/dir/mrc archive to xtreemfs manifest


git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5308 ef35cc4a-2640-4bbf-98bc-65920db7d8ae
conpaas-xtreemfs: implement and use set_snapshot to restore service metadata


git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5309 ef35cc4a-2640-4bbf-98bc-65920db7d8ae
conpaas-xtreemfs: call set_service_snapshot from manifest

git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5310 ef35cc4a-2640-4bbf-98bc-65920db7d8ae