Restore the Postgres tests (#1544)

Author: dunglas

.travis.yml

@@ -52,7 +52,7 @@ install:
 script:
   - vendor/bin/phpunit
   - if [[ $APP_ENV != 'postgres' ]]; then vendor/bin/behat --format=progress; fi
-  - if [[ $APP_ENV = 'postgres' ]]; then vendor/bin/behat --tags='~@sqlite&&@postgres' --format=progress; fi
+  - if [[ $APP_ENV = 'postgres' ]]; then vendor/bin/behat --tags='~@sqlite' --format=progress; fi
   - tests/Fixtures/app/console api:swagger:export > swagger.json && swagger-cli validate swagger.json && rm swagger.json
   - if [[ $lint = 1 ]]; then php php-cs-fixer.phar fix --dry-run --diff --no-ansi; fi
   - if [[ $lint = 1 ]]; then phpstan analyse -c phpstan.neon -l5 --ansi src tests; fi