airskiff: Pin Armada to K8s v2.11.0

Currently, OpenStack-Helm-Infra uses version 2.11.0 of Kubernetes.
Because Airskiff uses OpenStack-Helm-Infra for deployment of K8s, newer
versions of Armada cause the Airskiff gate to fail, as Armada now uses
Tiller v2.12.1. This commit pins Armada to the latest version that
utilized Tiller v2.11.0. This pin should be removed as soon as
OpenStack-Helm-Infra moves to v2.12.1.

Change-Id: Iaa3a776ffda9678b7736c1b1aac72a1adbedf29b

.zuul.yaml

@@ -45,6 +45,8 @@
     post-run: tools/gate/playbooks/debug-report.yaml
     required-projects:
       - name: openstack/airship-armada
+        # NOTE(drewwalters96): Temporarily pin Armada to K8s v2.11.0.
+        override-checkout: dd75474d78e69f3634eb94c8ea6730b898e83277
       - name: openstack/airship-deckhand
       - name: openstack/airship-pegleg
       - name: openstack/airship-shipyard

tools/deployment/airskiff/developer/005-make-airship.sh

@@ -25,7 +25,10 @@ CURRENT_DIR="$(pwd)"
 
 cd ${INSTALL_PATH}
 git clone https://git.openstack.org/openstack/airship-armada.git
-cd airship-armada && make images
+cd airship-armada
+# NOTE(drewwalters96): Temporarily pin Armada to K8s v2.11.0.
+git checkout dd75474d78e69f3634eb94c8ea6730b898e83277
+make images IMAGE_TAG=dd75474d78e69f3634eb94c8ea6730b898e83277
 
 cd ${INSTALL_PATH}
 git clone https://git.openstack.org/openstack/airship-deckhand.git

tools/deployment/airskiff/developer/030-armada-bootstrap.sh

@@ -20,9 +20,10 @@ set -xe
 : "${INSTALL_PATH:="$(pwd)/../"}"
 
 # Download latest Armada image and deploy Airship components
+# NOTE(drewwalters96): Temporarily pin Armada to K8s v2.11.0.
 docker run --rm --net host -p 8000:8000 --name armada \
     -v ~/.kube/config:/armada/.kube/config \
     -v "$(pwd)"/tools/deployment/airskiff/manifests/:/manifests \
     -v "${INSTALL_PATH}":/airship-components \
-    quay.io/airshipit/armada:latest \
+    quay.io/airshipit/armada:dd75474d78e69f3634eb94c8ea6730b898e83277 \
     apply /manifests/airship.yaml