DATAJDBC-201 - Reduced logging for builds.

Set logging level to WARN.
Removed a System.out call.

The detail loggers are still in the logback.xml as comments to be used for debugging and demonstration purposes.

src/main/java/org/springframework/data/jdbc/core/conversion/JdbcEntityWriter.java

@@ -99,7 +99,6 @@ public class JdbcEntityWriter extends JdbcEntityWriterSupport {
 
 		aggregateChange.addAction(insert);
 		referencedEntities(insert.getEntity()) //
-				.peek(System.out::println)
 				.forEach(pav -> insertReferencedEntities( //
 						pav, //
 						aggregateChange, //

src/test/resources/logback.xml

@@ -7,13 +7,11 @@
 		</encoder>
 	</appender>
 
-	<logger name="org.springframework.data" level="info" />
+	<!--<logger name="org.springframework.data" level="info" />-->
+	<!--<logger name="org.springframework.jdbc.core" level="trace" />-->
+	<!--<logger name="org.springframework.data.jdbc.mybatis.DummyEntityMapper" level="trace" />-->
 
-	<logger name="org.springframework.jdbc.core" level="trace" />
-
-	<logger name="org.springframework.data.jdbc.mybatis.DummyEntityMapper" level="trace" />
-
-	<root level="info">
+	<root level="warn">
 		<appender-ref ref="console" />
 	</root>