remove some remaining references to pdftk

stack/erp5/buildout.cfg

@@ -232,7 +232,7 @@ mode = 640
 # XXX: "template.cfg" is hardcoded in instanciation recipe
 filename = template.cfg
 template = ${:_profile_base_location_}/instance.cfg.in
-md5sum = bee6c2b640efee53e3b6e209127cb0bc
+md5sum = 2576de300d1a74fd1a99388af9723d42
 extra-context =
     key apache_location apache:location
     key aspell_location aspell:location
@@ -268,7 +268,6 @@ extra-context =
     key logrotate_location logrotate:location
     key mariadb_location mariadb:location
     key openssl_location openssl:location
-    key pdftk_location pdftk:location
     key poppler_location poppler:location
     key sed_location sed:location
     key template_cloudooo template-cloudooo:target
@@ -432,6 +431,7 @@ eggs =
   ordereddict
   paramiko
   ply
+  PyPDF2
   python-magic
   python-memcached
   pytz

stack/erp5/instance-tidstorage.cfg.in

@@ -134,7 +134,6 @@ link-binary =
   {{ parameter_dict['imagemagick'] }}/bin/identify
   {{ parameter_dict['mariadb'] }}/bin/mysql
   {{ parameter_dict['mariadb'] }}/bin/mysqldump
-  {{ parameter_dict['pdftk'] }}/bin/pdftk
   {{ parameter_dict['sed'] }}/bin/sed
   {{ parameter_dict['tesseract'] }}/bin/tesseract
   {{ parameter_dict['w3m'] }}/bin/w3m

stack/erp5/instance.cfg.in

@@ -39,7 +39,6 @@ grep = {{ grep_location }}
 imagemagick = {{ imagemagick_location }}
 librsvg = {{ librsvg_location }}
 mariadb = {{ mariadb_location }}
-pdftk = {{ pdftk_location }}
 sed = {{ sed_location }}
 tesseract = {{ tesseract_location }}
 w3m = {{ w3m_location }}