Fix check for missing behavior
Fix check for missing behavior

- The method exists on a behavior, and is proxied, so therefore `method_exists` is a bad check.
- You can't simply check for `hasBehavior('Search')` as a user can alias a behavior to another one.
- Since we are calling `filterParams` and that is the only dependency, simply checking if the method is in the `BehaviorRegistry::$methodMap` is enough.
dakota/crud,davidyell/crud,bravo-kernel/crud,ankr/crud,FriendsOfCake/crud-json-api,FriendsOfCake/crud,johanmeiring/crud,pwerken/cakephp-crud