.travis.yml: Update to latest conventions

.travis.yml

@@ -9,32 +9,21 @@ python:
   - "2.7"
 
 addons:
+  postgresql: "9.6"
   apt:
-    sources:
-      - pov-wkhtmltopdf
     packages:
       - expect-dev  # provides unbuffer utility
       - python-lxml  # because pip installation is slow
-      - wkhtmltopdf
-
-before_install:
-  - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
 
 env:
   global:
-  - VERSION="9.0" TESTS="0" LINT_CHECK="0" TRANSIFEX="0"
-  - TRANSIFEX_USER='transbot@odoo-community.org'
-  - secure: jX9I8iBSTGMGYNzj5zJkh/bvmXmemjqlKpVezZ2QMqaoXHgPPUlktxBwTMlmNeuJ5L9DlDiCqOiXpF41LDmKmjX/e99G15cvNSfQc/jG+exIfo9KSbc6aQSu8cqP+yu1MGTsuuq67Wm8N45+fFJGGsySUbGWFPXnF4MVIiZpqx0=
+  - VERSION="9.0" TESTS="0" LINT_CHECK="0" MAKEPOT="0"
 
   matrix:
   - LINT_CHECK="1"
-  - TRANSIFEX="1"
-  - TESTS="1" ODOO_REPO="odoo/odoo"
   - TESTS="1" ODOO_REPO="OCA/OCB"
+  - TESTS="1" ODOO_REPO="odoo/odoo" MAKEPOT="1"
 
-virtualenv:
-  system_site_packages: true
 
 install:
   - git clone --depth=1 https://github.com/OCA/maintainer-quality-tools.git ${HOME}/maintainer-quality-tools