Use finest logging level

This removes a confusing stack trace from the test run

Author: jeffgbutler

src/main/java/org/mybatis/dynamic/sql/reflection/wrapper/BeanWrapper.java

@@ -63,7 +63,7 @@ private Object invoke(Invoker invoker) {
         try {
             return invoker.invoke(object, NO_ARGUMENTS);
         } catch (ReflectiveOperationException e) {
-            log.log(Level.WARNING,
+            log.log(Level.FINEST,
                     "Invoker exception while retrieving property value, returning null", e); //$NON-NLS-1$
             return null;
         }