DATAREDIS-1096 - Polishing.

Remove unused imports and transition to java.time API. Original Pull Request: spring-projects#510

Author: christophstrobl

src/main/java/org/springframework/data/redis/connection/lettuce/DefaultLettucePool.java

@@ -22,7 +22,6 @@
 import io.lettuce.core.resource.ClientResources;
 
 import java.time.Duration;
-import java.util.concurrent.TimeUnit;
 
 import org.apache.commons.pool2.BasePooledObjectFactory;
 import org.apache.commons.pool2.PooledObject;
@@ -55,7 +54,7 @@ public class DefaultLettucePool implements LettucePool, InitializingBean {
 private String hostName = "localhost";
 private int port = 6379;
 private @Nullable String password;
-private long timeout = TimeUnit.MILLISECONDS.convert(60, TimeUnit.SECONDS);
+private long timeout = Duration.ofMinutes(1).toMillis();
 private @Nullable RedisSentinelConfiguration sentinelConfiguration;
 private @Nullable ClientResources clientResources;
 
@@ -120,7 +119,7 @@ public void afterPropertiesSet() {
 this.client = RedisClient.create(getRedisURI());
 }
 
-client.setDefaultTimeout(timeout, TimeUnit.MILLISECONDS);
+client.setDefaultTimeout(Duration.ofMillis(timeout));
 this.internalPool = new GenericObjectPool<>(new LettuceFactory(client, dbIndex), poolConfig);
 }
 

src/main/java/org/springframework/data/redis/connection/lettuce/StandaloneConnectionProvider.java

@@ -24,8 +24,6 @@
 import io.lettuce.core.codec.StringCodec;
 import io.lettuce.core.masterreplica.MasterReplica;
 import io.lettuce.core.masterreplica.StatefulRedisMasterReplicaConnection;
-import io.lettuce.core.masterslave.MasterSlave;
-import io.lettuce.core.masterslave.StatefulRedisMasterSlaveConnection;
 import io.lettuce.core.pubsub.StatefulRedisPubSubConnection;
 import io.lettuce.core.sentinel.api.StatefulRedisSentinelConnection;