Add db creation for travis

.travis.yml

@@ -2,8 +2,12 @@ sudo: false
 language: python
 python:
 - '3.4'
+addons:
+  postgresql: '9.3'
 install:
 - pip install -r requirements_for_test.txt
+before_script:
+- psql -c 'create database test_notification_api;' -U postgres
 script:
 - ./scripts/run_tests.sh
 env: