Modify address parsing code for node discovery #1186
Description
There is a PR up right now (elastic/elasticsearch#32806) that adds back an old ability to pull hostnames from a node as part of the discovery process. The format currently is just that of an IP address with a port, but in the future, may include a hostname as well in the format of hostname/ipaddress:port. We should make sure that we can parse that new format if it is available, and track both the hostname and IP for each node that is used for connecting. This would be beneficial to us since we can use the hostnames from the discovery process instead of relying on reverse resolving IP addresses to names for use in Kerberos Service principals.