added tests to show RequestBodyParamConverter::getValidatorOptions issue
fixed testValidatorOptionsStructureAfterMergeWithUserOptions: removed extra nesting
fixed #482
made RequestBodyParamConverter::getValidatorOptions more robust
used OptionsResolver to handle validator options
Merge pull request #483 from cystbear/fix-validator-options-merge-issue

Fix validator options merge issue
Fix missing validation_errors_argument parameter
Update 3-listener-support.md

Fixed doc typo
Merge pull request #487 from cystbear/patch-1

Update 3-listener-support.md
Merge pull request #486 from AlbertBrand/master

Always set when body_converter.validate = false
Merge branch 'FOS-master/master'