Switch uni-deltas job to use S3 API from Ceph

Glance/RBD is already covered by uni-gamma, so uni-delta could be changed to
test glance/S3 instead, using the S3 API provided by ceph.

https://issues.redhat.com/browse/OSPRH-11411

Author: Maxim Sava

examples/dt/uni04delta-ipv6/control-plane/service-values.yaml

@@ -35,16 +35,16 @@ data:
     customServiceConfig: |
       [DEFAULT]
       debug = True
-      enabled_backends = default_backend:rbd
+      enabled_backends = default_backend:s3
 
       [glance_store]
       default_backend = default_backend
 
       [default_backend]
-      rbd_store_ceph_conf = /etc/ceph/ceph.conf
-      store_description = "RBD backend"
-      rbd_store_pool = images
-      rbd_store_user = openstack
+      s3_store_create_bucket_on_put = True
+      s3_store_bucket_url_format = "path"
+    customServiceConfigSecrets:
+      - s3glance
     glanceAPIs:
       default:
         replicas: 3

examples/dt/uni04delta-ipv6/glance-s3-backend-secrets.yaml

@@ -0,0 +1,12 @@
+---
+# Define the "S3 glance backend" Secret that contains sensitive
+# information pertaining to the [S3] backend.
+apiVersion: v1
+kind: Secret
+metadata:
+  labels:
+    service: glance
+  name: s3glance
+type: Opaque
+stringData:
+  s3glance.conf: _replaced_

examples/dt/uni04delta-ipv6/kustomization.yaml

@@ -9,3 +9,4 @@ resources:
   - control-plane/networking/nncp/values.yaml
   - control-plane/service-values.yaml
   - values.yaml
+  - glance-s3-backend-secrets.yaml

examples/dt/uni04delta/control-plane/service-values.yaml

@@ -70,17 +70,15 @@ data:
   glance:
     customServiceConfig: |
       [DEFAULT]
-      debug = True
-      enabled_backends = default_backend:rbd
-
+      debug=true
+      enabled_backends = default_backend:s3
       [glance_store]
       default_backend = default_backend
-
       [default_backend]
-      rbd_store_ceph_conf = /etc/ceph/ceph.conf
-      store_description = "RBD backend"
-      rbd_store_pool = images
-      rbd_store_user = openstack
+      s3_store_create_bucket_on_put = True
+      s3_store_bucket_url_format = "path"
+    customServiceConfigSecrets:
+      - s3glance
     glanceAPIs:
       default:
         replicas: 3

examples/dt/uni04delta/glance-s3-backend-secrets.yaml

@@ -0,0 +1,12 @@
+---
+# Define the "s3glance" Secret that contains sensitive
+# information pertaining to the [s3] backend.
+apiVersion: v1
+kind: Secret
+metadata:
+  labels:
+    service: glance
+  name: s3glance
+type: Opaque
+stringData:
+  s3glance.conf: _replaced_

examples/dt/uni04delta/kustomization.yaml

@@ -9,3 +9,4 @@ resources:
   - control-plane/networking/nncp/values.yaml
   - control-plane/service-values.yaml
   - values.yaml
+  - glance-s3-backend-secrets.yaml