Merge branch '4.4'

* 4.4:
  [Debug] disable new DebugClassLoader when testing the legacy one
  - updated AbstractToken to compare Roles - Updated isEqualTo method to match roles as default User implements EquatableInterface - added test case - bumped symfony/security-core to 4.4
  typos bis
  typos
  Fix more bad tests
  Fix test fixtures with deprecated method signatures.
  Fix 4.3 tests forward compat
  [Messenger] fix empty amqp body returned as false
  [Mailer] Added messenger to dev dependencies.
  [Validator] Update "suggest" section in composer.json.
  Fix routing cache broken when using generator_class

Author: nicolas-grekas

composer.json

@@ -49,9 +49,9 @@
         "symfony/yaml": "<4.4"
     },
     "suggest": {
-        "psr/cache-implementation": "For using the metadata cache.",
+        "psr/cache-implementation": "For using the mapping cache.",
         "doctrine/annotations": "For using the annotation mapping. You will also need doctrine/cache.",
-        "doctrine/cache": "For using the default cached annotation reader and metadata cache.",
+        "doctrine/cache": "For using the default cached annotation reader.",
         "symfony/http-foundation": "",
         "symfony/intl": "",
         "symfony/translation": "For translating validation errors.",