* 2.8: (22 commits)
Tests and fix for issue in array model data in EntityType field with multiple=true
[Form] Fixed PercentToLocalizedStringTransformer to accept both comma and dot as decimal separator, if possible
removed useless PHPDoc
[Form] Fix FormInterface::submit() annotation
PdoSessionHandler: fix advisory lock for pgsql when session.sid_bits_per_character > 4
HttpCache does not consider ESI resources in HEAD requests
Fix translation for "This field was not expected"
[Routing] Enhance Route(Collection) docblocks
Added improvement for accuracy in MoneyToLocalizedStringTransformer.
Removed unused private property
Use correct verb form in the pull request template
Use PHP_MAXPATHLEN in Filesystem.
Added null as explicit return type (?TokenInterface)
[FrameworkBundle] Fix Routing\DelegatingLoader
Render all line breaks according to the exception message
[Form] Fix phpdoc
[DI] remove confusing code
[Form] Fixed GroupSequence with "constraints" option
[Validator] Clarify UUID validator behavior
[Filesystem] Fixed makePathRelative
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