MAGETWO-63796: Add container to the order view block to display custom attributes

- Add container to order view block to customer info section to display additional attributes.

Author: nikshostko

app/code/Magento/Sales/view/adminhtml/layout/sales_order_view.xml

@@ -22,7 +22,9 @@
             <block class="Magento\Sales\Block\Adminhtml\Order\View\Tabs" name="sales_order_tabs">
                 <block class="Magento\Sales\Block\Adminhtml\Order\View\Tab\Info" name="order_tab_info" template="order/view/tab/info.phtml">
                     <block class="Magento\Sales\Block\Adminhtml\Order\View\Messages" name="order_messages"/>
-                    <block class="Magento\Sales\Block\Adminhtml\Order\View\Info" name="order_info" template="order/view/info.phtml"/>
+                    <block class="Magento\Sales\Block\Adminhtml\Order\View\Info" name="order_info" template="order/view/info.phtml">
+                        <container name="extra_customer_info"/>
+                    </block>
                     <container name="order_additional_info"/>
                     <block class="Magento\Sales\Block\Adminhtml\Order\View\Items" name="order_items" template="order/view/items.phtml">
                         <arguments>

app/code/Magento/Sales/view/adminhtml/templates/order/view/info.phtml

@@ -145,6 +145,7 @@ $orderStoreDate = $block->formatDate(
                             <td><?php echo $block->escapeHtml($data['value']) ?></td>
                         </tr>
                     <?php endforeach;?>
+                    <?php echo $block->getChildHtml('extra_customer_info') ?>
                 </table>
             </div>
         </div>