HHH-19846 Drop JUnit 4 usage

Author: dreab8

hibernate-core/src/test/java/org/hibernate/orm/test/annotations/join/B.java

@@ -3,6 +3,7 @@
  * Copyright Red Hat Inc. and Hibernate Authors
  */
 package org.hibernate.orm.test.annotations.join;
+
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;

hibernate-core/src/test/java/org/hibernate/orm/test/annotations/join/C.java

@@ -3,6 +3,7 @@
  * Copyright Red Hat Inc. and Hibernate Authors
  */
 package org.hibernate.orm.test.annotations.join;
+
 import jakarta.persistence.Column;
 import jakarta.persistence.DiscriminatorValue;
 import jakarta.persistence.Entity;

hibernate-core/src/test/java/org/hibernate/orm/test/annotations/join/DogPk.java

@@ -3,6 +3,7 @@
  * Copyright Red Hat Inc. and Hibernate Authors
  */
 package org.hibernate.orm.test.annotations.join;
+
 import java.io.Serializable;
 import jakarta.persistence.Embeddable;