Specify valid configurations for TcpIpJoiner

We need to specify what are the requirements for a valid configuration in TcpIp joiner configuration and what can happen if they are not met.

* What happens if the member tries to join an open port which doesn't respond (e.g. it belongs to another application)?
* What happens if addresses (host:port pairs) overlaps for 2 clusters?
* Is supported the case when one member reaches another one on an address different from one selected by the `AddressPicker`?

This is related to issue hazelcast/hazelcast#15722.