conpaas: xtreemfs: fix for issue CONTRAIL-494

git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5531 ef35cc4a-2640-4bbf-98bc-65920db7d8ae
conpaas: xtreemfs: some bug fixes

git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5532 ef35cc4a-2640-4bbf-98bc-65920db7d8ae