Reverts JSON_NUMERIC_CHECK

We shouldn't be coercing types.
Merge branch '2.2' into 2.3

* 2.2:
  Reverts JSON_NUMERIC_CHECK
  Just a Typo
  [Yaml] removed wrong comment removal inside a string block
  Fixing configuration validation error messages.
  [HtppKernel] fixed inline fragment renderer
  fixed inline fragment renderer
  ProgressHelper shows percentage complete.
  Comment fixed: RedrawFrequency is measured in steps.
  fix handling of a default 'template' as a string

Conflicts:
	src/Symfony/Component/Console/Helper/ProgressHelper.php
	src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php
	src/Symfony/Component/HttpKernel/Tests/Fragment/HIncludeFragmentRendererTest.php
	src/Symfony/Component/HttpKernel/Tests/Fragment/InlineFragmentRendererTest.php