Added missing pt and pt_BR translations
Added missing dutch translations
minor #11203 Added missing dutch translations (WouterJ)

This PR was squashed before being merged into the 2.4 branch (closes #11203).

Discussion
----------

Added missing dutch translations

Commits
-------

bd9283e Added missing dutch translations
[Validator] added Lithuanian translation for empty file
Merge branch '2.4' into 2.5

* 2.4:
  Fixed failed config schema loads due to libxml_disable_entity_loader usage.
  enabled PHP 5.6 for tests
  [Process] Fix ExecutableFinder with open basedir
  Refactored the CssSelector to remove the circular object graph
  Fix mocks to support >=5.5.14 and >=5.4.30
  [ClassLoader] fixed PHP warning on PHP 5.3
  [Validator] added Lithuanian translation for empty file
  Added missing dutch translations
  [Components][Serializer] optional constructor arguments can be omitted during the denormalization process
  [DomCrawler] properly handle buttons with single and double quotes inside the name attribute
  Added missing pt and pt_BR translations