Fix tests for sql server which doesn't support order by nulls last

src/test/java/org/tests/aggregateformula/TestAggregateFormula.java

@@ -2,6 +2,8 @@ package org.tests.aggregateformula;
 
 import io.ebean.BaseTestCase;
 import io.ebean.Ebean;
+import io.ebean.annotation.IgnorePlatform;
+import io.ebean.annotation.Platform;
 import org.ebeantest.LoggedSqlCollector;
 import org.junit.Test;
 import org.tests.model.basic.Address;
@@ -17,6 +19,7 @@ import static org.junit.Assert.assertNotNull;
 
 public class TestAggregateFormula extends BaseTestCase {
 
+  @IgnorePlatform(Platform.SQLSERVER)
   @Test
   public void minDistinctOrderByNulls() {