Merge branch '2.7' into 2.8

* 2.7:
  [DI] minor FileLoaders tests update
  [HttpKernel] Revert BC breaking change of Request::isMethodSafe()
  [DOMCrawler] Bug fixed
  [Process] Do feat test before enabling TTY mode
  bumped Symfony version to 2.7.22
  updated VERSION for 2.7.21
  update CONTRIBUTORS for 2.7.21
  updated CHANGELOG for 2.7.21
  [Doctrine][Form] support large integers

Author: fabpot

EventListener/FragmentListener.php

@@ -81,7 +81,7 @@ public function onKernelRequest(GetResponseEvent $event)
     protected function validateRequest(Request $request)
     {
         // is the Request safe?
-        if (!$request->isMethodSafe()) {
+        if (!$request->isMethodSafe(false)) {
             throw new AccessDeniedHttpException();
         }
 

HttpCache/HttpCache.php

@@ -202,7 +202,7 @@ public function handle(Request $request, $type = HttpKernelInterface::MASTER_REQ
         }
         $this->traces[$request->getMethod().' '.$path] = array();
 
-        if (!$request->isMethodSafe()) {
+        if (!$request->isMethodSafe(false)) {
             $response = $this->invalidate($request, $catch);
         } elseif ($request->headers->has('expect') || !$request->isMethodCacheable()) {
             $response = $this->pass($request, $catch);