When Hazelcast is started on a fixed port and that port is already in
use, it does not fail to start which makes the problem hard to
detect. A symptom of the problem is that clients will not be able to
connect and will either retry indefinitely or will timeout depending
on their configuration.
This commit updates the Hazelcast client tests to start the Hazelcast
instance on an ephemeral port and to customize the client
configuration with the instance's address before use. This should
allow the client tests to work reliably in an environment where
Hazelcast's default port is already in use.
Closes gh-35903
088006ff60