FIX get result value from docker container

.gitlab-ci.yml

@@ -86,7 +86,8 @@ test:
       - docker logs docker_caosdb-server_1 &> ../caosdb_log.txt
       - docker logs docker_sqldb_1 &> ../mariadb_log.txt
       - docker-compose down
-      - rc=`cat /test_success`
+      - docker cp docker_tester_1:/test_success test_success 
+      - rc=`cat test_success`
       - exit $rc
   artifacts:
     paths: