Hot Rod client should support alternate resolution strategies

Hot Rod is configured with an initial list of individual DNS names/IPs to connect to.

It would be useful if it would look up and use all DNS records for the configured names just as if they were individually listed, instead of just one.

This would particularly be useful in cloud environments like OCP where individual pods can come and go, so listing each individually is not practical, but there is an internal service DNS name that will contain DNS entries for all the running pods.

Configuring withe default internal service name currently causes problems if the IP it gets goes down (it will continue to use the old IP due to DNS caching /sts caching, and doesn't have any other servers listed).