We now request a cluster node connection directly from the driver's connection handler and initiate reconfiguration if a cluster node is known through the topology but has no connection pool yet. This can happen if a cluster node is added to the cluster after the connection was initialized.
The connection handler cannot be obtained directly although the field where it's held is protected which increases the amount of necessary test code and reflection access to the connection handler.
Jedis discovers nodes during startup, on demand (full scan) or when requested (e.g. by a cluster redirection).
Original Pull Request: #270
bbd4482f26