MAGETWO-31559: [TD] Removing NominalItems usage

- added update script

Author: Pechenushko

app/code/Magento/Sales/sql/sales_setup/install-2.0.0.php

@@ -1646,6 +1646,12 @@
     '12,4',
     [],
     'Hidden Tax Canceled'
+)->addColumn(
+    'is_nominal',
+    \Magento\Framework\DB\Ddl\Table::TYPE_INTEGER,
+    null,
+    ['nullable' => false, 'default' => '0'],
+    'Is Nominal'
 )->addColumn(
     'tax_refunded',
     \Magento\Framework\DB\Ddl\Table::TYPE_DECIMAL,

app/code/Magento/Sales/sql/sales_setup/update-2.0.1.php

@@ -0,0 +1,12 @@
+<?php
+/**
+ * @copyright Copyright (c) 2014 X.commerce, Inc. (http://www.magentocommerce.com)
+ */
+
+/** @var $this \Magento\Sales\Model\Resource\Setup */
+$this->startSetup();
+/**
+ * update table 'sales_order_item'
+ */
+$table = $this->getConnection()->dropColumn('sales_order_item', 'is_nominal');
+$this->endSetup();