Add missing override methods to avoid calling default methods creating

unnecessary objects.

src/main/java/org/apache/commons/pool2/impl/DefaultPooledObject.java

@@ -171,11 +171,21 @@ public long getIdleTimeMillis() {
         return elapsed >= 0 ? elapsed : 0;
     }
 
+    @Override
+    public Instant getLastBorrowInstant() {
+        return lastBorrowInstant;
+    }
+
     @Override
     public long getLastBorrowTime() {
         return lastBorrowInstant.toEpochMilli();
     }
 
+    @Override
+    public Instant getLastReturnInstant() {
+        return lastReturnInstant;
+    }
+
     @Override
     public long getLastReturnTime() {
         return lastReturnInstant.toEpochMilli();