Refactor: extract card names compare logic (is empty name, is same name)

Fixed last broken tests

Mage/src/main/java/mage/constants/EmptyNames.java

@@ -0,0 +1,24 @@
+package mage.constants;
+
+/**
+ *
+ * @author JayDi85
+ */
+public enum EmptyNames {
+
+    // TODO: make names for that cards and enable Assert.assertNotEquals("", permanentName); for assertXXX tests
+    // TODO: replace all getName().equals to haveSameNames and haveEmptyName
+    FACE_DOWN_CREATURE(""), // "Face down creature"
+    FACE_DOWN_TOKEN(""); // "Face down token"
+
+    private final String cardName;
+
+    EmptyNames(String cardName) {
+        this.cardName = cardName;
+    }
+
+    @Override
+    public String toString() {
+        return cardName;
+    }
+}