change ALL_LEVEL to SYMFONY_LEVEL
minor #535 change ALL_LEVEL to SYMFONY_LEVEL (keradus)

This PR was squashed before being merged into the 1.0.x-dev branch (closes #535).

Discussion
----------

change ALL_LEVEL to SYMFONY_LEVEL

Resolve #464

Commits
-------

a05f4c9 change ALL_LEVEL to SYMFONY_LEVEL
Merge branch 'master' into curly_braces_check