DATAJDBC-413 - Polishing.

Removed excessive logging in tests.
Again.

spring-data-jdbc/src/test/resources/logback.xml

@@ -8,7 +8,7 @@
 	</appender>
 
 	<!--<logger name="org.springframework.data" level="info" />-->
-	<logger name="org.springframework.jdbc.core" level="trace" />
+    <!--<logger name="org.springframework.jdbc.core" level="trace" />-->
 	<!--<logger name="org.springframework.data.jdbc.mybatis.DummyEntityMapper" level="trace" />-->
 
 	<root level="warn">