minor #10219 [Console] Replace useless usage of ContainerAwareCommand (gregurco)

This PR was merged into the 4.1 branch.

Discussion
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[Console] Replace useless usage of ContainerAwareCommand

Hello.
Since SF 4.0 there is no need to use `ContainerAwareCommand` and injection through constructor. I removed usage of `ContainerAwareCommand` and added call of parent `constructor` because there is an error without it:
```
[WARNING] Some commands could not be registered:
Command class "App\Command\CommandName" is not correctly initialized. You probably forgot to call the parent constructor.
```

Commits
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0d1696c [Console] Replace useless usage of ContainerAwareCommand

Author: xabbuh

console/request_context.rst

@@ -78,12 +78,14 @@ router service and override its settings::
     use Symfony\Component\Routing\RouterInterface;
     // ...
 
-    class DemoCommand extends ContainerAwareCommand
+    class DemoCommand extends Command
     {
         private $router;
 
         public function __construct(RouterInterface $router)
         {
+            parent::__construct();
+        
             $this->router = $router;
         }