Merge branch '2.8'

* 2.8:
  Always enable clock-mock for HttpFoundation
  [ClassLoader] Fix parsing namespace when token_get_all() is missing
  Bug #16343 [Router] Too many Routes ?
  Fixes the stack traces of the deprecation logs
  fix unused variable warning
  [Translation][Form] Do not translate form labels and placeholders when 'translation_domain' is false
  add composer exclude-from-classmap for new 2.8 components
  [Yaml] sync changelog and upgrade files
  [Debug] Ensure class declarations are loaded only once
  Minor design tweaks for the Logs and Doctrine profiler panels

Conflicts:
	UPGRADE-2.8.md

Author: nicolas-grekas

composer.json

@@ -21,7 +21,10 @@
         "ext-ldap": "*"
     },
     "autoload": {
-        "psr-4": { "Symfony\\Component\\Ldap\\": "" }
+        "psr-4": { "Symfony\\Component\\Ldap\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
     },
     "minimum-stability": "dev",
     "extra": {