[2.0] Other fixes, removed E_FATAL of duplicate declaration and added test for Boolean type

tests/Doctrine/Tests/Models/Generic/BooleanModel.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Doctrine\Tests\Models\Generic;
+
+/**
+ * @Entity
+ * @Table(name="boolean_model")
+ */
+class DecimalModel
+{
+    /**
+     * @Id @Column(type="integer")
+     * @GeneratedValue(strategy="AUTO")
+     */
+    public $id;
+    /**
+     * @Column(type="boolean", default=true)
+     */
+    public $boolean;
+}