conpaas-client: output valid JSON in cpsclient.py download_manifest


git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5263 ef35cc4a-2640-4bbf-98bc-65920db7d8ae
conpaas-director: move php-specific manifest creation under MPhp


git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5264 ef35cc4a-2640-4bbf-98bc-65920db7d8ae