Add submariner to volsync env

Volsync creates a service on the destination cluster using ClusterIP or
LoadBalancer. The recommended way to make the service accessible to the
source cluster is using submariner export. Minikube has a tunnel command
that can expose services using LoadBalancer, but it is painful to use.

Since our submariner addon requires the broker on a separate cluster,
add a tiny hub cluster.

Signed-off-by: Nir Soffer <nsoffer@redhat.com>

test/envs/volsync.yaml

@@ -6,17 +6,30 @@
 name: volsync
 
 templates:
+  - name: hub
+    driver: kvm2
+    container_runtime: containerd
+    network: default
+    cni: kindnet
+    memory: 2g
+    workers:
+      - addons:
+          - name: submariner
+            args: [hub, dr1, dr2]
   - name: cluster
     driver: kvm2
     container_runtime: containerd
     network: default
+    cni: kindnet
     memory: 4g
     disk_size: 50g
     addons:
       - volumesnapshots
       - csi-hostpath-driver
 
 profiles:
+  - name: hub
+    template: hub
   - name: dr1
     template: cluster
   - name: dr2