Fix unused type compiler warnings

spring-orm/src/test/java/org/springframework/orm/jdo/JdoInterceptorTests.java

@@ -77,6 +77,7 @@ public class JdoInterceptorTests {
 	}
 
 
+	@SuppressWarnings("unused")
 	private static class TestInvocation implements MethodInvocation {
 
 		private PersistenceManagerFactory persistenceManagerFactory;

spring-orm/src/test/java/org/springframework/orm/jpa/JpaInterceptorTests.java

@@ -198,6 +198,7 @@ public class JpaInterceptorTests {
 	}
 
 
+	@SuppressWarnings("unused")
 	private static class TestInvocation implements MethodInvocation {
 
 		private EntityManagerFactory entityManagerFactory;