slaprunner : Try to install libxslt before lxml egg

software/slaprunner/software.cfg

 [buildout]
 extends =
   ../../stack/flask.cfg
+  ../../component/lxml-python/buildout.cfg
 
 extensions =
   slapos.rebootstrap
@@ -8,6 +9,7 @@ extensions =
 
 parts =
   eggs
+  template
 
 find-links +=
   http://www.nexedi.org/static/packages/source/slapos.buildout/
@@ -28,6 +30,7 @@ section = python2.7
 [runner]
 recipe = zc.recipe.egg
 eggs =
+  ${lxml-python:egg}
   slapos.toolbox
   slapos.cookbook