Merge branch '5.0'

* 5.0: (47 commits)
  reset the kernel cache after each test
  [HttpKernel] Ability to define multiple kernel.reset tags
  [Routing] Continue supporting single colon in object route loaders
  [FWBundle] Remove unused parameter
  [Intl] [Workflow] fixes English grammar typos
  [Filesystem] [Serializer] fixes English grammar typo
  mailer: mailchimp bridge is throwing undefined index _id when setting message id in mandrill http transport
  has_roles should be is_granted in security upgrade file
  has_roles should be is_granted in upgrade files
  [HttpClient] Fix early cleanup of pushed HTTP/2 responses
  skip test on incompatible PHP versions
  [HttpKernel] Don't cache "not-fresh" state
  Drop WebServerBundle directory
  [FrameworkBundle][Cache] Don't deep-merge cache pools configuration
  [Messenger] Adding exception to amqp transport in case amqp ext is not installed
  [SecurityBundle] Don't require a user provider for the anonymous listener
  [DoctrineBridge] Fixed cs in DoctrineType
  [Monolog Bridge] Fixed accessing static property as non static.
  Improve Symfony description
  [Mailer] Add UPGRADE entries about Envelope and MessageEvent
  ...

Author: Robin Chalas

Tests/FilesystemTest.php

@@ -783,7 +783,7 @@ public function testSymlink()
         $file = $this->workspace.\DIRECTORY_SEPARATOR.'file';
         $link = $this->workspace.\DIRECTORY_SEPARATOR.'link';
 
-        // $file does not exists right now: creating "broken" links is a wanted feature
+        // $file does not exist right now: creating "broken" links is a wanted feature
         $this->filesystem->symlink($file, $link);
 
         $this->assertTrue(is_link($link));