* 2.7:
[2.3] CS And DocBlock Fixes
[Serializer] Serialization groups support
[2.3] CS Fixes
Fixed the issue 11116
[Security] Fixed tests
[Debug] use ternary operator to simplify the getClassLoader() method in DebugClassLoader class.
[FrameworkBundle] Fixed Translation loader and update translation command.
[Console] remove « use » statement for PHP built-in exception classes.
[SecurityBundle] replaced deprecated SecurityContextInterface dependency by new TokenStorageInterface instance in SecurityDataCollector. Also added unit tests suite for SecurityDataCollector class.
[SecurityBundle] use TokenStorageInterface instead of deprecated SecurityContextInterface in SecurityDataCollector and added unit tests suite.
[SecurityBundle] adds unit tests suite for SecurityDataCollector class.
[Serializer] Add xml_format_output context option. Close#12517.
[WebProfilerBundle] Fixed IE8 support
