Fixed a missing import.

git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5038 ef35cc4a-2640-4bbf-98bc-65920db7d8ae
Moving cpsclient installation instructions from 'User Guide' to 'Installation' section.

git-svn-id: svn://svn.forge.objectweb.org/svnroot/contrail/trunk/conpaas@5042 ef35cc4a-2640-4bbf-98bc-65920db7d8ae