HHH-7934 - Test case

(cherry picked from commit 2f71f07)

Author: lukasz-antoniak

hibernate-envers/src/test/java/org/hibernate/envers/test/integration/ids/protectedmodifier/WrappedStringId.java

@@ -1,7 +1,9 @@
 package org.hibernate.envers.test.integration.ids.protectedmodifier;
 
 import java.io.Serializable;
+import javax.persistence.Embeddable;
 
+@Embeddable
 public class WrappedStringId implements Serializable {
 	String id;