Simplify and modernise profile.

Avoid using not required extensions:

 * slapos.rebootstrap is not needed, as python running buildout is somehow
   trusted, and it is enough to use python section in order to have own
   python compilation used by running software
 * slapos.zcbworkarounds is useful only in corner cases, which are not
   introduced in this profile
 * mr.developer is not used at all

software/erp5testnode/software.cfg

 [buildout]
-extensions =
-  slapos.rebootstrap
-  slapos.zcbworkarounds
-  mr.developer
 
 find-links = http://www.nexedi.org/static/packages/source/slapos.buildout/
     http://dist.repoze.org
@@ -20,7 +16,6 @@ extends =
 
 parts =
   template
-  bootstrap
   eggs
   subversion
   zip
@@ -60,19 +55,6 @@ location = ${buildout:parts-directory}/${:_buildout_section_name_}
 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]
-recipe = zc.recipe.egg
-eggs = zc.buildout
-suffix =
-scripts =
-    buildout=bootstrap2.7
-arguments = sys.argv[1:] + ["bootstrap"]
-
-[rebootstrap]
-section = python2.7
-version = 2
-eggs = slapos.libnetworkcache
-
 [versions]
 # Use SlapOS patched zc.buildout
 zc.buildout = 1.5.3-dev-SlapOS-005
@@ -97,6 +79,11 @@ scripts =
   slapgrid-cp = slapos.grid.slapgrid:runComputerPartition
   slapproxy = sslapos.proxy:main
 
+python = python2.7
+
+[lxml-python]
+python = python2.7
+
 [template]
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/instance.cfg