This PR was squashed before being merged into the 4.0.x-dev branch (closes#464).Discussion----------Default FQCN for invokable controllersThis PR implements the [@dunglas's idea](symfony/symfony#21723 (comment)) to make the `service` argument optional for invokable controllers, it allows to omit this argument when using the new convention of using FQN as id. **Before:**```use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;/** *@route(service="AppBundle\Controller\Hello") */class Hello{    private $logger;    public function __construct(LoggerInterface $logger)    {        $this->logger = $logger;    }    /**     *@route("/hello/{name}", name="hello")     */    public function __invoke($name = 'World')    {        $this->logger->info('log entry...');        return new Response(sprintf('Hello %s!', $name));    }}```**After:**```use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;class Hello{    private $logger;    public function __construct(LoggerInterface $logger)    {        $this->logger = $logger;    }    /**     *@route("/hello/{name}", name="hello")     */    public function __invoke($name = 'World')    {        $this->logger->info('log entry...');        return new Response(sprintf('Hello %s!', $name));    }}```**TODO**- [x] Add Tests- [x] Fix fabbot.ioCommits-------7463c50 Default FQCN for invokable controllers

…controller/class (yceruto)This PR was merged into the 3.3-dev branch.Discussion----------[Routing][DX] Add full route definition for invokable controller/class| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| License       | MIT| Doc PR        | _not yet_Currently the [`@Route`][1] annotation can be set on the class (for global parameters only). This PR allows you to define the full route annotation for _single_ controllers on the class.Here a common use case of [ADR pattern][3] applied to Symfony:**Before:**```use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;/** *@route(service="AppBundle\Controller\Hello") */class Hello{    private $logger;    public function __construct(LoggerInterface $logger)    {        $this->logger = $logger;    }    /**     *@route("/hello/{name}", name="hello")     */    public function __invoke($name = 'World')    {        $this->logger->info('log entry...');        return new Response(sprintf('Hello %s!', $name));    }}```**After:**```use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;/** *@route("/hello/{name}", name="hello", service="AppBundle\Controller\Hello") */class Hello{    private $logger;    public function __construct(LoggerInterface $logger)    {        $this->logger = $logger;    }    public function __invoke($name = 'World')    {        $this->logger->info('log entry...');        return new Response(sprintf('Hello %s!', $name));    }}```This feature does not break any behavior before and works under these conditions: * The class cannot contain other methods with `@Route` annotation (otherwise, this works as before: used for global parameters). *  <del>The class `@Route` must have the `name` option defined (otherwise, the route is ignored).</del> This one is auto-generated if `null`. * The class must be invokable: [`__invoke()` method][2] (otherwise, the route is ignored).Btw, this PR fix the inconsistency with other route definitions (xml, yml) where the `_controller` parameter points to the class name only (i.e. without method).  [1]:https://github.com/symfony/symfony/tree/master/src/Symfony/Component/Routing/Annotation/Route.php  [2]:http://php.net/manual/en/language.oop5.magic.php#object.invoke  [3]:https://github.com/pmjones/adrCommits-------34e360a Add full route definition to invokable class