fix mapping for docker test

docker-compose.test.yml

@@ -55,12 +55,12 @@ services:
     image: docker.fet.at/fet2020django
     container_name: test_fet2020
     environment:
-     - HOST_NAME: test.fet.at
-     - DEBUG: "False"
-     - SECRET_KEY: "sadfreigjopi4qgjpjrp"
-     - MYSQL_USER: "user"
-     - MYSQL_PASSWORD: "hgu"
-     - ETHERPAD_GROUP: "g.snlbqn7S6ksRbom3"
+     HOST_NAME: "test.fet.at"
+     DEBUG: "False"
+     SECRET_KEY: "sadfreigjopi4qgjpjrp"
+     MYSQL_USER: "user"
+     MYSQL_PASSWORD: "hgu"
+     ETHERPAD_GROUP: "g.snlbqn7S6ksRbom3"
     depends_on:
     - mysql
     - etherpad