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

Firewall/ExceptionListener.php

@@ -209,7 +209,7 @@ private function startAuthentication(Request $request, AuthenticationException $
     protected function setTargetPath(Request $request)
     {
         // session isn't required when using HTTP basic authentication mechanism for example
-        if ($request->hasSession() && $request->isMethodSafe() && !$request->isXmlHttpRequest()) {
+        if ($request->hasSession() && $request->isMethodSafe(false) && !$request->isXmlHttpRequest()) {
             $request->getSession()->set('_security.'.$this->providerKey.'.target_path', $request->getUri());
         }
     }