* 2.8:
[HttpKernel] clearstatcache() so the Cache sees when a .lck file has been released
[WIP] [Form] [TwigBridge] Bootstrap horizontal theme missing tests
[Serializer] Improve ObjectNormalizer performance
AssetBundle - fix docs
[Yaml] more fixes to changelog and upgrade files
CS: remove impossible default argument value
* 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