- extend deployment parts, do not override

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@33035 20353a03-c40f-0410-a6d1-a30d3c3de9de

buildout/profiles/development.cfg

 [buildout]
 extends = ../profiles/deployment.cfg
 
-parts =
+parts +=
   zope-instance
 
 [software_definition]