update symfony 2.7.19

[chihiro-adachi]

symfony及びその他ライブラリの更新

Symfony 2.7.19 released
http://symfony.com/blog/symfony-2-7-19-released

doctrine dbal 2.5.5
https://github.com/doctrine/dbal/releases/tag/v2.5.5

• symfony
  • Updating symfony/* (v2.7.18) to symfony/* (v2.7.19)
• doctrine
  • Updating doctrine/dbal (v2.5.4) to doctrine/dbal (v2.5.5)
• others
  • Updating friendsofphp/php-cs-fixer (v1.12.1) to friendsofphp/php-cs-fixer (v1.12.2)
  • Updating phing/phing (2.14.0) to phing/phing (2.15.0)
  • Updating psr/log (1.0.0) to psr/log (1.0.1)
• 備考
  • fzaninotto/faker v1.6.0は Fix: fix invalid parameter of mb_substr() fzaninotto/Faker#917 の不具合があるので見送り
  • twig/twig (v1.26.0) は見送り
    • vfsStreamのパスが扱えなくなっており、テストがこける
      • https://travis-ci.org/chihiro-adachi/ec-cube/jobs/165114205
    • パスの扱いが少し不安定な様子
      • BC break regarding relative paths in 1.25 due to realpath changes (#2127)  twigphp/Twig#2145
      • twigphp/Twig@6f0e3ed#commitcomment-19208378

[Yangsin]

fixed #1737