Turn down logging in DefaultListableBeanFactory

Reduce INFO level startup logging to DEBUG

Issue: SPR-10758

Author: philwebb

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java

@@ -609,8 +609,8 @@ protected boolean isBeanEligibleForMetadataCaching(String beanName) {
 
 	@Override
 	public void preInstantiateSingletons() throws BeansException {
-		if (this.logger.isInfoEnabled()) {
-			this.logger.info("Pre-instantiating singletons in " + this);
+		if (this.logger.isDebugEnabled()) {
+			this.logger.debug("Pre-instantiating singletons in " + this);
 		}
 		List<String> beanNames;
 		synchronized (this.beanDefinitionMap) {