try again to install dependencies with pip

.travis.yml

@@ -13,8 +13,6 @@ addons:
       - python-simplejson
       - python-serial
       - python-yaml
-      - python-pypdf  # repo specific
-      - python-fdfgen
 
 env:
   global:
@@ -32,7 +30,8 @@ virtualenv:
   system_site_packages: true
 
 install:
-  - pip install PyPDF2
+  - pip install pypdf
+  - pip install fdfgen
   - git clone --depth=1 https://github.com/OCA/maintainer-quality-tools.git ${HOME}/maintainer-quality-tools
   - export PATH=${HOME}/maintainer-quality-tools/travis:${PATH}
   - travis_install_nightly