Use erp5testnode branch

software/erp5testnode/software.cfg

@@ -57,7 +57,7 @@ command = grep parts ${buildout:develop-eggs-directory}/slapos.cookbook.egg-link
 recipe = plone.recipe.command
 stop-on-error = true
 location = ${buildout:parts-directory}/${:_buildout_section_name_}
-command = ${git:location}/bin/git clone --quiet http://git.erp5.org/repos/slapos.git ${:location}
+command = ${git:location}/bin/git clone -b erp5testnode --quiet http://git.erp5.org/repos/slapos.git ${:location}
 update-command = cd ${:location} && ${git:location}/bin/git pull --quiet
 
 [bootstrap]