Update testing.rst

Fix dead link, @see:
https://github.com/silexphp/Silex/issues/1020
minor #1021 Update testing.rst (1emming)

This PR was submitted for the master branch but it was merged into the 1.2 branch instead (closes #1021).

Discussion
----------

Update testing.rst

Fix dead link, @see:
https://github.com/silexphp/Silex/issues/1020

Commits
-------

8c8b6a6 Update testing.rst
fixed translator

As of Symfony 2.5.2, Translator::__construct() calls setLocale.
As the Silex Translator calls it with null and because we synchronize
the translator language with the app one, the locale was always
set to null when calling the translator for the first time, overriding
the current app locale.
fixed translator

As of Symfony 2.5.2, Translator::__construct() calls setLocale.
As the Silex Translator calls it with null and because we synchronize
the translator language with the app one, the locale was always
set to null when calling the translator for the first time, overriding
the current app locale.
bug #1029 fixed translator (fabpot)

This PR was merged into the 1.2 branch.

Discussion
----------

fixed translator

Fixes #1028, #988, #983, #1023

That makes the tests pass again.

Commits
-------

712375b fixed translator
updated CHANGELOG
prepared the 1.2.2 release
bumped version to 1.2.3-DEV
Merge branch '1.2'

* 1.2:
  bumped version to 1.2.3-DEV
  prepared the 1.2.2 release
  updated CHANGELOG
  fixed translator
  fixed translator
  Update testing.rst

Conflicts:
	doc/changelog.rst
	src/Silex/Application.php