use pyPdf instead of PyPDF2 until PyPDF2 can be installed

stack/erp5/buildout.cfg

@@ -15,6 +15,8 @@ find-links =
     http://www.nexedi.org/static/packages/source/
     http://www.owlfish.com/software/wsgiutils/download.html
 
+allow-hosts += pybrary.net
+
 extends =
 # Exact version of Zope
   http://svn.zope.org/repos/main/Zope/tags/2.12.26/versions.cfg
@@ -212,7 +214,7 @@ extra-context =
 [template-tidstorage]
 recipe = slapos.recipe.build:download
 url = ${:_profile_base_location_}/instance-tidstorage.cfg.in
-md5sum = 5e0c5de5bc17947c152de73b329a5a02
+md5sum = bd5872108f812c6823a8915670e51c4c
 mode = 640
 
 [template-cloudooo]
@@ -431,7 +433,7 @@ eggs =
   ordereddict
   paramiko
   ply
-  PyPDF2
+  pyPdf # should be replaced by PyPDF2, but it is not installable
   python-magic
   python-memcached
   pytz