Update metallb to v0.8.1 (#183)

Signed-off-by: Justin Scott <justin.a.scott@intel.com>

clr-k8s-examples/6-metal-lb/overlays/v0.8.1/kustomization.yaml

@@ -0,0 +1,6 @@
+resources:
+  - metallb/manifests/example-layer2-config.yaml
+  - metallb/manifests/metallb.yaml
+
+patchesStrategicMerge:
+  - patch_configmap.yaml

clr-k8s-examples/6-metal-lb/overlays/v0.8.1/patch_configmap.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: config
+data:
+  config: |
+    address-pools:
+    - name: my-ip-space
+      protocol: layer2
+      addresses:
+      - 10.0.0.240/28

clr-k8s-examples/create_stack.sh

@@ -210,7 +210,7 @@ function efk() {
 }
 
 function metallb() {
-	METALLB_VER=${1:-v0.7.3}
+	METALLB_VER=${1:-v0.8.1}
 	METALLB_URL="https://github.com/danderson/metallb.git"
 	METALLB_DIR="6-metal-lb"
 	get_repo "${METALLB_URL}" "${METALLB_DIR}/overlays/${METALLB_VER}"