DATAREDIS-1115 - Reduce log level for shared connection renewal.

Original pull request: #485.

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

@@ -1227,7 +1227,7 @@ public class LettuceConnectionFactory
 
 				if (!valid) {
 
-					log.warn("Validation of shared connection failed. Creating a new connection.");
+					log.info("Validation of shared connection failed. Creating a new connection.");
 					resetConnection();
 					this.connection = getNativeConnection();
 				}