reactivate e2e tests

Signed-off-by: Malte Meiboom <malte@netropol.de>

.gitlab-ci.yml

@@ -6,3 +6,9 @@ test-job:
   image: localhost:5000/huskbuilder:latest
   script:
     - cargo test
+
+e2e-test-job:
+  stage: test
+  image: localhost:5000/mta:latest
+  script:
+    - cd e2e-tests && bash runner.sh