[FIX] Update travis signature (#567)

.travis.yml

@@ -1,44 +1,33 @@
 language: python
-
-python:
-  - "2.7"
-
 sudo: false
 cache: pip
 
+python:
+  - "2.7.13"
+
 addons:
+  postgresql: "9.6"
   apt:
     packages:
-      - expect-dev  # provides unbuffer utility
-      - python-lxml  # because pip installation is slow
-      - python-simplejson
-      - python-serial
-      - python-yaml
-
+      - expect-dev
+
 env:
   global:
   - VERSION="10.0" TESTS="0" LINT_CHECK="0" TRANSIFEX="0"
   - TRANSIFEX_USER='transbot@odoo-community.org'
   - secure: "OCZHnpmr+dvwVzAHmfeOUa2/VuvepsdguW129zR7jEO5HJupI8imqq3D8JKStUVnAgpA+Igpni+mfFsmhvr7K6pdk9w15zWlO+ml/7EwRflnyWAdtLNv44PTfaOcuCkzf73HPKRiW+LLUOeDqSqF1BLdb7mgSpLFWMuO7pJK0aI="
-  - WKHTMLTOPDF_VERSION="0.12.4"
+  - PHANTOMJS_VERSION="latest"
+  - WEBSITE_REPO="0"
+
   matrix:
   - LINT_CHECK="1"
-  - TESTS="1" ODOO_REPO="odoo/odoo"
+  - TESTS="1" ODOO_REPO="odoo/odoo" MAKEPOT="1"
   - TESTS="1" ODOO_REPO="OCA/OCB"
-  - TRANSIFEX="1"
-
-virtualenv:
-  system_site_packages: true
-
-before_install:
-  - "export DISPLAY=:910.0"
-  - "sh -e /etc/init.d/xvfb start"
 
 install:
   - 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
-  - pip install --ignore-installed git+https://github.com/OCA/openupgradelib.git@master
 
 script:
   - travis_run_tests