Add failing test for DDC-1787.

Using joined table inheritance, when persisting multiple new entities
that are subclasses of a baseclass that has the @Version attribute set,
only the last persisted entity will have it's version set.

tests/Doctrine/Tests/ORM/Functional/Ticket/DDC1787Test.php

@@ -0,0 +1,63 @@
+<?php
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+require_once __DIR__ . '/../../../TestInit.php';
+
+/**
+ * @group DDC-1787
+ */
+class DDC1787Test extends \Doctrine\Tests\OrmFunctionalTestCase
+{
+    public function setUp()
+    {
+        parent::setUp();
+        $this->_schemaTool->createSchema(array(
+            $this->_em->getClassMetadata(__NAMESPACE__ . '\DDC1787Foo'),
+            $this->_em->getClassMetadata(__NAMESPACE__ . '\DDC1787Bar'),
+        ));
+    }
+
+    public function testIssue()
+    {
+        $bar = new DDC1787Bar;
+        $bar2 = new DDC1787Bar;
+
+        $this->_em->persist($bar);
+        $this->_em->persist($bar2);
+        $this->_em->flush();
+
+        $this->assertSame(1, $bar->getVersion());
+    }
+}
+
+/**
+ * @Entity
+ * @InheritanceType("JOINED")
+ * @DiscriminatorColumn(name="discr", type="string")
+ * @DiscriminatorMap({"bar" = "DDC1787Bar"})
+ */
+class DDC1787Foo
+{
+    /**
+     * @Id @Column(type="integer") @GeneratedValue(strategy="AUTO")
+     */
+    private $id;
+
+    /**
+     * @Version @Column(type="integer")
+     */
+    private $version;
+
+    public function getVersion()
+    {
+        return $this->version;
+    }
+}
+
+/**
+ * @Entity
+ */
+class DDC1787Bar extends DDC1787Foo
+{
+}