minor #3697 [Console] Change Command namespaces (dunglas)

This PR was merged into the master branch.

Discussion
----------

[Console] Change Command namespaces

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.5

See #3696 (comment)

Commits
-------

0816a07 [Console] Change Command namespaces

components/console/changing_default_command.rst

@@ -12,7 +12,7 @@ will always run the ``ListCommand`` when no command name is passed. In order to
 the default command you just need to pass the command name you want to run by
 default to the ``setDefaultCommand`` method::
 
-    namespace Acme\Command;
+    namespace Acme\Console\Command;
 
     use Symfony\Component\Console\Command\Command;
     use Symfony\Component\Console\Input\InputInterface;
@@ -36,7 +36,7 @@ Executing the application and changing the default Command::
 
     // application.php
 
-    use Acme\Command\HelloWorldCommand;
+    use Acme\Console\Command\HelloWorldCommand;
     use Symfony\Component\Console\Application;
 
     $command = new HelloWorldCommand();

components/console/introduction.rst

@@ -35,7 +35,7 @@ Creating a basic Command
 To make a console command that greets you from the command line, create ``GreetCommand.php``
 and add the following to it::
 
-    namespace Acme\Command;
+    namespace Acme\Console\Command;
 
     use Symfony\Component\Console\Command\Command;
     use Symfony\Component\Console\Input\InputArgument;
@@ -88,7 +88,7 @@ an ``Application`` and adds commands to it::
     <?php
     // application.php
 
-    use Acme\Command\GreetCommand;
+    use Acme\Console\Command\GreetCommand;
     use Symfony\Component\Console\Application;
 
     $application = new Application();
@@ -415,7 +415,7 @@ useful one is the :class:`Symfony\\Component\\Console\\Tester\\CommandTester`
 class. It uses special input and output classes to ease testing without a real
 console::
 
-    use Acme\Command\GreetCommand;
+    use Acme\Console\Command\GreetCommand;
     use Symfony\Component\Console\Application;
     use Symfony\Component\Console\Tester\CommandTester;
 
@@ -444,7 +444,7 @@ You can test sending arguments and options to the command by passing them
 as an array to the :method:`Symfony\\Component\\Console\\Tester\\CommandTester::execute`
 method::
 
-    use Acme\Command\GreetCommand;
+    use Acme\Console\Command\GreetCommand;
     use Symfony\Component\Console\Application;
     use Symfony\Component\Console\Tester\CommandTester;