CHG: Use linkahead-client.json

Use LINKAHEAD_CLIENT_CONFIGURATION instead of CAOSDB_CLIENT_CONFIGURATION

.docker/Dockerfile

@@ -13,6 +13,7 @@ WORKDIR /caosdb-cppinttest
 RUN rm -rf .git
 
 COPY .docker/caosdb-client.json /caosdb-client.json
+COPY .docker/linkahead-client.json /linkahead-client.json
 
 # Build and run tests.
 # If no other command is given to the Docker image

.docker/linkahead-client.json

+{
+  "connections": {
+    "default": {
+      "host": "caosdb-server",
+      "port": 8443,
+      "server_certificate_path": "/cert/caosdb.cert.pem",
+      "authentication": {
+        "type": "plain",
+        "username": "admin",
+        "password": "caosdb"
+      }
+    }
+  }
+}

.docker/tester.yml

@@ -5,7 +5,7 @@ services:
     environment:
       CAOSDB_SERVER_HOST: caosdb-server
       CAOSDB_SERVER_CERT: /cert/caosdb.cert.pem
-      CAOSDB_CLIENT_CONFIGURATION: /caosdb-client.json
+      LINKAHEAD_CLIENT_CONFIGURATION: /linkahead-client.json
     networks:
       - docker_caosnet
     volumes: