This adds an ingress to the Elasticsearch chart, allowing for the
exposure of the Elasticsearch cluster externally if required.
This also removes the node ports from the data and discovery
services, as these ports should not be used beyond service
discovery by the elasticsearch nodes. It moves the node port for
the client service under the network.elasticsearch key to match
the network tree for the other services
Change-Id: Ia989eff87b8c9f112c697ae309bbb971dc699aa5
