olapy: temporarily use our modified version of Olapy

This version:
 - do not depends on pyscopg2 ( and postgresql )
 - do not have version spec in dependencies ( to prevent version conflicts )
 - serve a sample cube without any setup

component/olapy/buildout.cfg

@@ -3,12 +3,11 @@ extends =
   ../numpy/buildout.cfg
   ../lxml-python/buildout.cfg
   ../git/buildout.cfg
-  ../postgresql/buildout.cfg
 
 [olapy-repository]
 recipe = slapos.recipe.build:gitclone
-repository = https://github.com/abilian/olapy.git
-branch = master
+repository = https://lab.nexedi.com/nexedi/olapy.git
+branch = feat/erp5_integration
 git-executable = ${git:location}/bin/git
 
 [olapy-develop]