Added option to show controllers optionally in the router:debug command
merged branch peterrehm/router-command (PR #8657)

This PR was squashed before being merged into the master branch (closes #8657).

Discussion
----------

Added option to show controllers optionally in the router:debug command

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Added option to show controllers in the router debug command as a convenience function.

    app/console router:debug --show-controllers

Commits
-------

6fd32f3 Added option to show controllers optionally in the router:debug command
[Validator] The default option name can now be omitted when defining constraints as annotations
merged branch bschussek/constraint-annotation-improvement (PR #8979)

This PR was merged into the master branch.

Discussion
----------

[Validator] The default option name can now be omitted when defining constraints as annotations

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

When a constraint has a default option, but other options should be set as well, the name of the default option had to be set explicitly when defining the constraint as annotation:

```php
/** @GreaterThan(value=2, message="Should be greater than 2") */
private $value;
```

After this PR, it is possible to omit the name of the default option:

```php
/** @GreaterThan(2, message="Should be greater than 2") */
private $value;
```

Commits
-------

5499a29 [Validator] The default option name can now be omitted when defining constraints as annotations