Switch to python 2.7.

stack/kvm.cfg

 [buildout]
-##XXX upgrade to 2.7
 extends =
-  ../component/python-2.6/buildout.cfg
+  ../component/python-2.7/buildout.cfg
   ../component/lxml-python/buildout.cfg
   ../component/git/buildout.cfg
   ../component/zlib/buildout.cfg
@@ -13,9 +12,6 @@ extends =
   ../component/rdiff-backup/buildout.cfg
   ../component/dcron/buildout.cfg
 
-extensions =
-  slapos.rebootstrap
-
 parts =
   gnutls
   kvm
@@ -27,10 +23,6 @@ find-links +=
 
 versions = versions
 
-[rebootstrap]
-section = python2.6
-version = 1
-
 [instance-recipe]
 egg = slapos.cookbook
 module = kvm
@@ -38,7 +30,7 @@ module = kvm
 [instance-recipe-egg]
 slaposcookbook_dummy = ${slaposcookbook:location}
 recipe = zc.recipe.egg
-python = python2.6
+python = python2.7
 eggs = ${instance-recipe:egg}
 
 [gpg-error]