Stop using kube-apiserver insecure-port

The tiller container in the armada bootstrap pod relies on the insecure
port that kube-apiserver once listened on by default. The kube-apiserver
ability to serve on an insecure port, deprecated since v1.10, has been
removed in v1.20. [0]

This change updates the armada bootstrap pod to use the secure port
instead.

0: https://github.com/kubernetes/kubernetes/pull/95856

Change-Id: I6a37fa4e7f97c7aaa3cd0f61b56214483a7dc217

promenade/templates/roles/genesis/etc/kubernetes/manifests/bootstrap-armada.yaml

@@ -21,6 +21,8 @@ spec:
     - env:
       - name: TILLER_NAMESPACE
         value: kube-system
+      - name: KUBECONFIG
+        value: /etc/kubernetes/admin/config
       image: {{ config['Genesis:images.helm.tiller'] }}
       command:
         - /tiller
@@ -61,8 +63,13 @@ spec:
         successThreshold: 1
         timeoutSeconds: 1
       resources: {}
+      securityContext:
+        runAsUser: 0
       terminationMessagePath: /dev/termination-log
       terminationMessagePolicy: File
+      volumeMounts:
+        - name: auth
+          mountPath: /etc/kubernetes/admin
     - name: armada
       image: {{ config['Genesis:images.armada'] }}
       securityContext:
@@ -149,7 +156,7 @@ spec:
         {%- endfor %}
 {% include "genesis-apiserver.yaml" with context %}
         - --etcd-servers=https://localhost:12379
-        - --insecure-port=8080
+        - --insecure-port=0
         - --secure-port=6444
         - --endpoint-reconciler-type=none
       env: