increase rebootstrap:version because python version is modified in r43997.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@44007 20353a03-c40f-0410-a6d1-a30d3c3de9de

slapos/software.cfg

@@ -108,7 +108,7 @@ python = python2.6
 
 [rebootstrap]
 # Default first version of rebootstrapped python
-version = 1
+version = 2
 section = python2.7
 
 [template]