CORE-783 Fixes according to review

- Removed superfluous interfaces and entries in ProductDependencyProvider
- Added missing interfaces for business classes
- Fixed missing / wrong specifications and inherits
- Renamed ProductMetadata to ItemMetadata
- Used UtilEncodingService instead of json_encode
- Fix usage of missing twig file in order detail view
- Resolved some dependency issues

src/Spryker/Zed/Customer/Business/CustomerBusinessFactory.php

@@ -148,7 +148,7 @@ protected function getStore()
     }
 
     /**
-     * @return \Spryker\Zed\Customer\Business\Sales\CustomerOrderHydrator
+     * @return \Spryker\Zed\Customer\Business\Sales\CustomerOrderHydratorInterface
      */
     public function createCustomerOrderHydrator()
     {

src/Spryker/Zed/Customer/Business/CustomerFacade.php

@@ -435,10 +435,10 @@ public function findByReference($customerReference)
     }
 
     /**
-     * @api
-     *
      * {@inheritdoc}
      *
+     * @api
+     *
      * @param \Generated\Shared\Transfer\OrderTransfer $orderTransfer
      *
      * @return \Generated\Shared\Transfer\OrderTransfer

src/Spryker/Zed/Customer/Business/CustomerFacadeInterface.php

@@ -317,8 +317,8 @@ public function findByReference($customerReference);
      * @api
      *
      * Specification
-     *  - finds customer by reference
-     *  - stores customer information on an order
+     *  - Finds customer by reference
+     *  - Hydrates the customer information into an order
      *
      * @param \Generated\Shared\Transfer\OrderTransfer $orderTransfer
      *

src/Spryker/Zed/Customer/Business/Sales/CustomerOrderHydrator.php

@@ -10,13 +10,13 @@
 use Generated\Shared\Transfer\OrderTransfer;
 use Spryker\Zed\Customer\Business\Customer\CustomerInterface;
 
-class CustomerOrderHydrator
+class CustomerOrderHydrator implements CustomerOrderHydratorInterface
 {
 
     /**
      * @var \Spryker\Zed\Customer\Business\Customer\CustomerInterface
      */
-    private $customer;
+    protected $customer;
 
     /**
      * @param \Spryker\Zed\Customer\Business\Customer\CustomerInterface $customer

src/Spryker/Zed/Customer/Business/Sales/CustomerOrderHydratorInterface.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * Copyright © 2016-present Spryker Systems GmbH. All rights reserved.
+ * Use of this software requires acceptance of the Evaluation License Agreement. See LICENSE file.
+ */
+
+namespace Spryker\Zed\Customer\Business\Sales;
+
+use Generated\Shared\Transfer\OrderTransfer;
+
+interface CustomerOrderHydratorInterface
+{
+
+    /**
+     * @param \Generated\Shared\Transfer\OrderTransfer $orderTransfer
+     *
+     * @return \Generated\Shared\Transfer\OrderTransfer
+     */
+    public function hydrateOrderTransfer(OrderTransfer $orderTransfer);
+
+}