We now create and release Lettuce connections using LettuceConnectionProvider. Connection providers encapsulate the underlying client and expose only creation and release methods. A connection provider can provide connections for Standalone or Cluster connections or wrap a LettucePool.
Previously we used RedisClient and RedisClusterClient directly which required context propagation (pooling/non-pooling) conditional code to obtain the appropriate connection type.
Original Pull Request: #262
5ac7f8eb19