Change initialCapacity in AnnotationAuditingMetadata to match the number of data being added.

As support for Joda Time has been removed from the PR below, the amount of data added has been reduced. So I change the initialCapacity of List from 5 to 3.

Closes #2668

Author: namsoo2

src/main/java/org/springframework/data/auditing/AnnotationAuditingMetadata.java

@@ -58,7 +58,7 @@ final class AnnotationAuditingMetadata {
 
 	static {
 
-		List<String> types = new ArrayList<>(5);
+		List<String> types = new ArrayList<>(3);
 		types.add(Date.class.getName());
 		types.add(Long.class.getName());
 		types.add(long.class.getName());