Add example contour deployment with internal-elb (#390)

Adds an example contour custom resoruce object that would provision with
an internal-facing load balancer.

Signed-off-by: Derrik Campau <dcampau@vmware.com>

examples/contour/contour-aws-internal-lb.yaml

@@ -0,0 +1,12 @@
+apiVersion: operator.projectcontour.io/v1alpha1
+kind: Contour
+metadata:
+  name: contour-sample
+spec:
+  networkPublishing:
+    envoy:
+      type: LoadBalancerService
+      loadBalancer:
+        providerParameters:
+          type: AWS
+        scope: Internal