WIP: fix tests

.docker/tester.yml

@@ -3,6 +3,8 @@ services:
   tester:
     image: "$CPPINTTEST_REGISTRY_IMAGE"
     environment:
+      CAOSDB_SERVER_HOST: caosdb-server
+      CAOSDB_SERVER_CERT: /cert/caosdb.cert.pem
       CAOSDB_CLIENT_CONFIGURATION: /caosdb-client.json
     networks:
       - docker_caosnet