springframeworkguru#20 - Privacy - field was make private and the checking of equality now works using the dollar object instead of teh value of the amount field

(cherry picked from commit ff6e64a)

Author: patrick.corbett@infomotion.de

src/main/java/guru/springframework/Dollar.java

@@ -5,7 +5,7 @@
  */
 public class Dollar {
 
-    int amount;
+    private int amount;
 
     public Dollar(int pAmount) {
         amount = pAmount;

src/test/java/guru/springframework/MoneyTest.java

@@ -12,9 +12,9 @@ class MoneyTest {
     void testMultiplication() {
         Dollar five = new Dollar(5);
         Dollar product = five.times(2);
-        Assertions.assertEquals(10, product.amount);
+        Assertions.assertEquals(new Dollar(10), product);
         product = five.times(3);
-        Assertions.assertEquals(15, product.amount);
+        Assertions.assertEquals(new Dollar(15), product);
     }
 
     @Test