Wait for mysql to be up to fix tests.

.travis.yml

@@ -44,9 +44,10 @@ install:
 
 script:
   - cd project && vendor/bin/phapp setup localdev
-  # Fix permissions in docker container by setting the right users.
+  # Fix permissions in docker container by setting the right user.
   - export COMPOSE_DEFAULT_USER=$(id -u $USER)
   - docker-compose up -d
+  - echo "Waiting for mysql to come up..." && docker-compose exec cli /bin/bash -c "while ! echo exit | nc mariadb 3306; do sleep 1; done" >/dev/null
   - docker-compose exec cli phapp install --no-build
   - curl -v http://example.project.localdev.space | grep "Drupal 8"