"insert into table default values" is invalid MySQL syntax (#1978)

* ADD: failing testcase for "insert into table default values;" is invalid MySql syntax

* FIX: "insert into table default values;" is invalid MySql syntax

src/test/java/org/tests/defaultvalues/TestDefaults.java

@@ -0,0 +1,36 @@
+package org.tests.defaultvalues;
+
+import io.ebean.BaseTestCase;
+import io.ebean.Ebean;
+import org.ebeantest.LoggedSqlCollector;
+import org.junit.Test;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TestDefaults extends BaseTestCase {
+
+  @Test
+  public void testInsertDefaultValues() {
+    final DefaultsModel main = new DefaultsModel();
+
+    for (int i = 0; i < 5; i++) {
+      final ReferencedDefaultsModel ref = new ReferencedDefaultsModel();
+      ref.setName("r" + i);
+      main.getRelatedModels().add(ref);
+    }
+
+    LoggedSqlCollector.start();
+    Ebean.save(main);
+    final List<String> current = LoggedSqlCollector.current();
+
+    assertThat(current).isNotEmpty();
+    if (isMySql()) {
+      assertThat(current.get(0)).contains("insert into defaults_model_draft values (default);");
+    } else {
+      assertThat(current.get(0)).contains("insert into defaults_model_draft default values;");
+    }
+  }
+
+}