Send order email for Braintree Paypal orders

Order emails are sent using observers on the
`sales_model_service_quote_submit_success` event, but only in the
`webapi_rest` and `webapi_soap` areas. When customers checkout with
Braintree Paypal the order placement occurs in the `frontend` area with
a request to `Magento\Braintree\Controller\Paypal\PlaceOrder`, so these
orders were not sent a new order email.

Fixes #13778
Fixes #12792

Author: Patrick McLain

…Quote/Observer/Webapi/SubmitObserver.php …agento/Quote/Observer/SubmitObserver.phpapp/code/Magento/Quote/Observer/Webapi/SubmitObserver.php renamed to app/code/Magento/Quote/Observer/SubmitObserver.php app/code/Magento/Quote/Observer/Webapi/SubmitObserver.php renamed to app/code/Magento/Quote/Observer/SubmitObserver.php

@@ -3,7 +3,7 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-namespace Magento\Quote\Observer\Webapi;
+namespace Magento\Quote\Observer;
 
 use Magento\Sales\Model\Order\Email\Sender\OrderSender;
 use Magento\Framework\Event\ObserverInterface;

…t/Observer/Webapi/SubmitObserverTest.php …est/Unit/Observer/SubmitObserverTest.phpapp/code/Magento/Quote/Test/Unit/Observer/Webapi/SubmitObserverTest.php renamed to app/code/Magento/Quote/Test/Unit/Observer/SubmitObserverTest.php app/code/Magento/Quote/Test/Unit/Observer/Webapi/SubmitObserverTest.php renamed to app/code/Magento/Quote/Test/Unit/Observer/SubmitObserverTest.php

@@ -3,12 +3,12 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-namespace Magento\Quote\Test\Unit\Observer\Webapi;
+namespace Magento\Quote\Test\Unit\Observer;
 
 class SubmitObserverTest extends \PHPUnit\Framework\TestCase
 {
     /**
-     * @var \Magento\Quote\Observer\Webapi\SubmitObserver
+     * @var \Magento\Quote\Observer\SubmitObserver
      */
     protected $model;
 
@@ -59,7 +59,7 @@ protected function setUp()
         $eventMock->expects($this->once())->method('getQuote')->willReturn($this->quoteMock);
         $eventMock->expects($this->once())->method('getOrder')->willReturn($this->orderMock);
         $this->quoteMock->expects($this->once())->method('getPayment')->willReturn($this->paymentMock);
-        $this->model = new \Magento\Quote\Observer\Webapi\SubmitObserver(
+        $this->model = new \Magento\Quote\Observer\SubmitObserver(
             $this->loggerMock,
             $this->orderSenderMock
         );

app/code/Magento/Quote/etc/frontend/events.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
+    <event name="sales_model_service_quote_submit_success">
+        <observer name="sendEmail" instance="Magento\Quote\Observer\SubmitObserver" />
+    </event>
+</config>

app/code/Magento/Quote/etc/webapi_rest/events.xml

@@ -7,6 +7,6 @@
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
     <event name="sales_model_service_quote_submit_success">
-        <observer name="sendEmail" instance="Magento\Quote\Observer\Webapi\SubmitObserver" />
+        <observer name="sendEmail" instance="Magento\Quote\Observer\SubmitObserver" />
     </event>
 </config>

app/code/Magento/Quote/etc/webapi_soap/events.xml

@@ -7,6 +7,6 @@
 -->
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
     <event name="sales_model_service_quote_submit_success">
-        <observer name="sendEmail" instance="Magento\Quote\Observer\Webapi\SubmitObserver" />
+        <observer name="sendEmail" instance="Magento\Quote\Observer\SubmitObserver" />
     </event>
 </config>