Merge branch '4.4' into 5.0

* 4.4:
  [Routing] fix tests
  [Form] group constraints when calling the validator
  Remove wrong @group legacy annotations
  [DependencyInjection] Fix dumping multiple deprecated aliases
  allow button names to start with uppercase letter
  States that the HttpClient provides a Http Async implementation

Author: nicolas-grekas

Tests/Firewall/ExceptionListenerTest.php

@@ -72,9 +72,6 @@ public function getAuthenticationExceptionProvider()
         ];
     }
 
-    /**
-     * @group legacy
-     */
     public function testExceptionWhenEntryPointReturnsBadValue()
     {
         $event = $this->createEvent(new AuthenticationException());

Tests/Firewall/LogoutListenerTest.php

@@ -123,9 +123,6 @@ public function testHandleMatchedPathWithoutSuccessHandlerAndCsrfValidation()
         $listener($event);
     }
 
-    /**
-     * @group legacy
-     */
     public function testSuccessHandlerReturnsNonResponse()
     {
         $this->expectException('RuntimeException');

Tests/RememberMe/AbstractRememberMeServicesTest.php

@@ -39,9 +39,6 @@ public function testAutoLoginReturnsNullWhenNoCookie()
         $this->assertNull($service->autoLogin(new Request()));
     }
 
-    /**
-     * @group legacy
-     */
     public function testAutoLoginThrowsExceptionWhenImplementationDoesNotReturnUserInterface()
     {
         $this->expectException('RuntimeException');