Specify absolute build project path

.gitlab-ci.yml

@@ -40,4 +40,4 @@ test:
     - git submodule update --remote --recursive --init releng/org.fortiss.af3.target
     - git submodule update --remote --recursive --init tests/af3
   script:
-    - mvn $MAVEN_CLI_OPTS $MAVEN_TEST_OPTS -Duser.dir=$CI_PROJECT_PATH test
+    - mvn $MAVEN_CLI_OPTS $MAVEN_TEST_OPTS -Duser.dir=/builds/$CI_PROJECT_PATH test