Disabled more tests for DB2

ebean-test/src/test/java/org/tests/model/history/TestHistoryExclude.java

@@ -70,7 +70,7 @@ public class TestHistoryExclude extends BaseTestCase {
     linkFound.getDocs().size();
   }
 
-  @IgnorePlatform(Platform.ORACLE)
+  @IgnorePlatform({Platform.ORACLE, Platform.DB2})
   @Test
   public void testAsOfThenLazy() {
 

ebean-test/src/test/java/org/tests/model/history/TestHistoryInclude.java

@@ -37,7 +37,7 @@ public class TestHistoryInclude extends BaseTestCase {
     assertThat(linkFound.getDocs().size()).isEqualTo(2);
   }
 
-  @IgnorePlatform(Platform.ORACLE)
+  @IgnorePlatform({Platform.ORACLE, Platform.DB2})
   @Test
   public void testAsOfThenLazy() {
 

ebean-test/src/test/java/org/tests/model/history/TestHistoryOneToMany.java

@@ -14,7 +14,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 
 public class TestHistoryOneToMany extends BaseTestCase {
 
-  @IgnorePlatform(Platform.ORACLE)
+  @IgnorePlatform({Platform.ORACLE, Platform.DB2})
   @Test
   public void test() throws InterruptedException {