Send emails on password reset to the displayname

Signed-off-by: Joas Schilling <coding@schilljs.com>

core/Controller/LostController.php

@@ -378,7 +378,7 @@ class LostController extends Controller {
 
 		try {
 			$message = $this->mailer->createMessage();
-			$message->setTo([$email => $user->getUID()]);
+			$message->setTo([$email => $user->getDisplayName()]);
 			$message->setFrom([$this->from => $this->defaults->getName()]);
 			$message->useTemplate($emailTemplate);
 			$this->mailer->send($message);

tests/Core/Controller/LostControllerTest.php

@@ -93,6 +93,9 @@ class LostControllerTest extends \Test\TestCase {
 		$this->existingUser->expects($this->any())
 			->method('getUID')
 			->willReturn('ExistingUser');
+		$this->existingUser->expects($this->any())
+			->method('getDisplayName')
+			->willReturn('Existing User');
 		$this->existingUser->expects($this->any())
 			->method('isEnabled')
 			->willReturn(true);
@@ -344,7 +347,7 @@ class LostControllerTest extends \Test\TestCase {
 		$message
 			->expects($this->at(0))
 			->method('setTo')
-			->with(['test@example.com' => 'ExistingUser']);
+			->with(['test@example.com' => 'Existing User']);
 		$message
 			->expects($this->at(1))
 			->method('setFrom')
@@ -422,7 +425,7 @@ class LostControllerTest extends \Test\TestCase {
 		$message
 			->expects($this->at(0))
 			->method('setTo')
-			->with(['test@example.com' => 'ExistingUser']);
+			->with(['test@example.com' => 'Existing User']);
 		$message
 			->expects($this->at(1))
 			->method('setFrom')
@@ -494,7 +497,7 @@ class LostControllerTest extends \Test\TestCase {
 		$message
 			->expects($this->at(0))
 			->method('setTo')
-			->with(['test@example.com' => 'ExistingUser']);
+			->with(['test@example.com' => 'Existing User']);
 		$message
 			->expects($this->at(1))
 			->method('setFrom')