Fixed failing Kubernetes tests after deny_all for experimental API

The tests were broken by  apache#9611

Author: potiuk

chart/templates/configmap.yaml

@@ -42,6 +42,9 @@ data:
     remote_logging = True
 {{- end }}
 
+    [api]
+    auth_backend = {{ .Values.api.authBackend }}
+
     [logging]
     logging_level = DEBUG
     [webserver]

chart/values.yaml

@@ -434,3 +434,7 @@ postgresql:
   enabled: true
   postgresqlPassword: postgres
   postgresqlUsername: postgres
+
+# Authentication backend used for the experimental API
+api:
+  authBackend: airflow.api.auth.backend.deny_all

scripts/ci/libraries/_kind.sh

@@ -294,7 +294,8 @@ function deploy_airflow_with_helm() {
         --set "defaultAirflowRepository=${DOCKERHUB_USER}/${DOCKERHUB_REPO}" \
         --set "images.airflow.repository=${DOCKERHUB_USER}/${DOCKERHUB_REPO}" \
         --set "images.airflow.tag=${AIRFLOW_PROD_BASE_TAG}" -v 1 \
-        --set "defaultAirflowTag=${AIRFLOW_PROD_BASE_TAG}" -v 1
+        --set "defaultAirflowTag=${AIRFLOW_PROD_BASE_TAG}" -v 1 \
+        --set "api.authBackend=airflow.api.auth.backend.default"
     echo
     popd || exit 1
 }