DATAREDIS-842 - Consider database index when connecting to Redis using Redis Sentinel.

Original pull request: #345.

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

@@ -981,6 +981,7 @@ public class LettuceConnectionFactory
 		getRedisPassword().toOptional().ifPresent(redisUri::setPassword);
 		clientConfiguration.getClientName().ifPresent(redisUri::setClientName);
 		redisUri.setTimeout(clientConfiguration.getCommandTimeout());
+		redisUri.setDatabase(getDatabase());
 
 		return redisUri;
 	}