software/theia/test: use absolute links for find-links

our new nexedi.org currently no longer serve static pages with links,
using absolute links should allow us to have test passing until this is
fixed.

software/theia/test/resilience_dummy/software.cfg

 [buildout]
 
 find-links +=
-  http://www.nexedi.org/static/packages/source/
-  http://www.nexedi.org/static/packages/source/slapos.buildout/
+  http://www.nexedi.org/static/packages/source/slapos.buildout/zc.buildout-2.7.1%2Bslapos010.tar.gz
+  http://www.nexedi.org/static/packages/source/zc.recipe.egg-2.0.3%2Bslapos003.tar.gz
 
 parts =
   instance-template