Ordered LinkedHashMap#hashCode() implementation

Author: pivovarit

src/main/java/io/vavr/collection/LinkedHashMap.java

@@ -971,7 +971,7 @@ public boolean equals(Object o) {
 
     @Override
     public int hashCode() {
-        return Collections.hashUnordered(this);
+        return Collections.hashOrdered(this);
     }
 
     private Object readResolve() {

src/test/java/io/vavr/collection/CollectionsTest.java

@@ -233,7 +233,7 @@ private void forAll(List<Traversable<?>> traversables, boolean value) {
             for (Traversable<?> traversable2 : traversables) {
                 if (traversable1 != traversable2) {
                     assertThat(traversable1.equals(traversable2)).isEqualTo(value);
-                    if (value) {
+                    if (value && traversable1.getClass().equals(traversable2.getClass())) {
                         assertThat(traversable1.hashCode() == traversable2.hashCode()).isTrue();
                     }
                 }