Explicitly sudo to postgres user to make test user

Author: palfrey

.travis.yml

@@ -17,7 +17,7 @@ addons:
   postgresql: 10
 
 before_script:
-  - psql -c "CREATE USER foo WITH PASSWORD 'bar';" -U postgres
+  - sudo -u postgres psql -c "CREATE USER foo WITH PASSWORD 'bar';" -U postgres
 
 script:
   - cargo test -- --nocapture || travis_terminate 1