[CI] Update travis configuration

.travis.yml

@@ -9,6 +9,7 @@ python:
   - "2.7"
 
 addons:
+  postgresql: "9.6"
   apt:
     packages:
       - expect-dev  # provides unbuffer utility
@@ -19,22 +20,31 @@ addons:
       - cups
       - libcups2-dev
 
+stages:
+  - linting
+  - test
+
+jobs:
+  include:
+    - stage: linting
+      env:
+        - LINT_CHECK="1"
+    - stage: test
+      env:
+        # add MAKEPOT="1" to a TEST line to export .pot files from
+        # the test database after test success
+        - TESTS="1" ODOO_REPO="odoo/odoo" MAKEPOT="1"
+    - stage: test
+      env:
+        - TESTS="1" ODOO_REPO="OCA/OCB"
+
 env:
   global:
   - VERSION="9.0" TESTS="0" LINT_CHECK="0" TRANSIFEX="0"
-  - WKHTMLTOPDF_VERSION="0.12.4"
+  - WKHTMLTOPDF_VERSION="0.12.5"
   - TRANSIFEX_USER='transbot@odoo-community.org'
   - secure: HwYn7vV4wIM4ocObmgkylZmaw6FQynkbMiJmoTTfgL3y3Gy6IAPVXgTNXFUiIuYXZZ4B2GOAfcECQejCCw2KP7OCcBo1oGNuSJ2aVwiQcRH1ENDLTsMq1jcB/4vQuAmTS8WEE5nRkPyutwgE4kBYvZC4tENatakafPRAS+iNqpQ=
 
-  matrix:
-  - LINT_CHECK="1"
-  - TRANSIFEX="1"
-  - TESTS="1" ODOO_REPO="odoo/odoo"
-  - TESTS="1" ODOO_REPO="OCA/OCB"
-
-virtualenv:
-  system_site_packages: true
-
 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}