Merge pull request #481 from jsampedro77/use-serializer-interface

ViewHandler, check Serializer against Interface, not against concrete class
Added validation support to the request body converter
Ignore controller arguments of type ConstraintValidationInterface when
generating routes
Update configuration and service definition
validator alias tests
Updated documentation
Allow passing options to the validator
Updated docs with a note suggesting to disable automatic route
generation for routes using the body converter