Fix EZP-22414: Session is lost when redirecting from a legacy module
EZP-22414: Deactivated ezxFormToken in TemplateDebugInfo

This avoids double checks on form token, which sometimes can end up to fatal errors.
For example when on a POST request with a redirection.

No security issue here as:
1. It's only for the web debug toolbar
2. All checks have already been done anyway as at this point we are in an kernel.response listener
EZP-22414: Added test
Merge pull request #780 from ezsystems/fix_EZP-22414_symfonySessionLostRedirection

Fix EZP-22414: Session is lost when redirecting from a legacy module