Use user's timezone for timestamps in CSV export

Signed-off-by: Christian Hartmann <chris-hartmann@gmx.de>

lib/Service/SubmissionService.php

@@ -200,7 +200,7 @@ class SubmissionService {
 
 		$questions = $this->questionMapper->findByForm($form->getId());
 		$defaultTimeZone = date_default_timezone_get();
-		$userTimezone = $this->config->getUserValue('core', 'timezone', $this->currentUser->getUID(), $defaultTimeZone);
+		$userTimezone = $this->config->getUserValue($this->currentUser->getUID(), 'core', 'timezone', $defaultTimeZone);
 
 		// Process initial header
 		$header = [];

tests/Unit/Service/SubmissionServiceTest.php

@@ -492,7 +492,7 @@ class SubmissionServiceTest extends TestCase {
 		date_default_timezone_set('Europe/Berlin');
 		$this->config->expects($this->once())
 			->method('getUserValue')
-			->with('core', 'timezone', 'currentUser', 'Europe/Berlin')
+			->with('currentUser', 'core', 'timezone', 'Europe/Berlin')
 			->willReturn('Europe/Berlin');
 
 		$user = $this->createMock(IUser::class);