better documentation for multi-git-sync

Author: Maleware

docs/modules/airflow/pages/usage-guide/mounting-dags.adoc

@@ -85,6 +85,21 @@ See the xref:usage-guide/applying-custom-resources.adoc[] example for more detai
 
 === Multiple repositories via git-sync
 
-If you want to access multiple branches of a repository or load dags from multiple repositories, you can extend the list shown above. Those repositories get consolidated beneath `stackable/app/allDAGs/current-i`, where `i` is the position in the list ranging from (0,1,..,n-1).
+If you want to access multiple branches of a repository or load dags from multiple repositories, you can extend the list shown above. 
+
+The default mount-path for git-sync resources is `/stackable/app/allDAGs/current-{i}` where i corresponds to:
+
+[source,yaml]
+----
+    dagsGitSync:
+      - repo: ssh://git@github.com/stackable-airflow/dags.git # <-- current-0
+        branch: test/git-sync-0
+        credentials:
+          sshPrivateKeySecretName: git-sync-ssh
+      - repo: ssh://git@github.com/stackable-airflow/dags.git # <-- current-1
+        branch: test/git-sync-1
+        credentials:
+          sshPrivateKeySecretName: git-sync-ssh
+----
 
 NOTE: Using DAG's from ConfigMaps will need you to either use celeryExecutors and mount them under `/stackable/app/allDAGs/<name>` or use kubernetesExecutor and mount them somewhere else and change the PYTHONPATH as well as the `AIRFLOW\__CORE__DAGS_FOLDER` accordingly.

tests/templates/kuttl/mount-dags-gitsync/30-install-airflow-cluster.yaml.j2

@@ -82,6 +82,8 @@ spec:
           sshPrivateKeySecretName: git-sync-ssh
       - repo: ssh://git@github.com/stackable-airflow/dags.git
         branch: test/git-sync-1
+        credentials:
+          sshPrivateKeySecretName: git-sync-ssh
 {% endif %}
 {% if test_scenario['values']['access'] == 'https' %}
       - repo: https://github.com/stackable-airflow/dags
@@ -90,6 +92,8 @@ spec:
           basicAuthSecretName: git-credentials
       - repo: https://github.com/stackable-airflow/dags
         branch: test/git-sync-1
+        credentials:
+          basicAuthSecretName: git-credentials
 {% endif %}
 {% if test_scenario['values']['executor'] == 'celery' %}
         # Just setting some values to increase the test coverage (defaults should work just fine)