Add IBM Cloud Private Istio multicluster deployment example. (#2029)
Add IBM Cloud Private Istio multicluster deployment example. (#2029)

* Add IBM Cloud Private Istio multicluster deployment example.

* Addressed sdake's comments.

* Second round review from sdake.

istio/istio.io,geeknoid/istio.github.io,geeknoid/istio.github.io,linsun/istio.github.io,geeknoid/istio.github.io,istio/istio.io,geeknoid/istio.github.io,linsun/istio.github.io,linsun/istio.github.io,linsun/istio.github.io,istio/istio.io,istio/istio.io,geeknoid/istio.github.io,linsun/istio.github.io,istio/istio.io,istio/istio.io,istio/istio.io