7174736: JCK test api/java_util/HashMap/index_EntrySet failing

Summary: Corrects a problem with HashMap.removeEntry() that caused a JCK test to fail
Reviewed-by: mduigou
Contributed-by: alan.bateman@oracle.com

src/share/classes/java/util/HashMap.java

@@ -611,7 +611,7 @@ public class HashMap<K,V>
 
         Map.Entry<?,?> entry = (Map.Entry<?,?>) o;
         Object key = entry.getKey();
-        int hash = (key == null) ? 0 : hash(key.hashCode());
+        int hash = (key == null) ? 0 : hash(key);
         int i = indexFor(hash, table.length);
         @SuppressWarnings("unchecked")
             Entry<K,V> prev = (Entry<K,V>)table[i];