Update some more request handling

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

tests/integration/features/bootstrap/FeatureContext.php

@@ -974,11 +974,9 @@ class FeatureContext implements Context, SnippetAcceptingContext {
 		$deleted = false;
 
 		$this->deleteUser($user);
-		try {
-			$this->userExists($user);
-		} catch (ClientException $ex) {
-			$deleted = true;
-		}
+
+		$response = $this->userExists($user);
+		$deleted = $response->getStatusCode() === 404;
 
 		if (!$deleted) {
 			Assert::fail("User $user exists");

tests/integration/features/bootstrap/SharingContext.php

@@ -25,7 +25,7 @@ use Behat\Behat\Context\Context;
 use Behat\Gherkin\Node\TableNode;
 use GuzzleHttp\Client;
 use GuzzleHttp\Cookie\CookieJar;
-use GuzzleHttp\Message\ResponseInterface;
+use Psr\Http\Message\ResponseInterface;
 
 class SharingContext implements Context {
 
@@ -511,7 +511,7 @@ class SharingContext implements Context {
 
 		// Clean opcode cache
 		$client = new GuzzleHttp\Client();
-		$client->send($client->createRequest('GET', $this->baseUrl . '/apps/testing/clean_opcode_cache.php'));
+		$client->request('GET', $this->baseUrl . '/apps/testing/clean_opcode_cache.php');
 
 		\PHPUnit\Framework\Assert::assertEquals(0, $lastCode);
 	}