minor symfony#64 Fixed the help notes of the AddUser command (javiereguiluz)

This PR was squashed before being merged into the master branch (closes symfony#64).

Discussion
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Fixed the help notes of the AddUser command

In the [run() method of the Command class](https://github.com/symfony/symfony/blob/2.7/src/Symfony/Component/Console/Command/Command.php#L220-263) you can see the following:

```php
public function run(InputInterface $input, OutputInterface $output)
{
    // ...

    $this->initialize($input, $output);

    // ...

    if ($input->isInteractive()) {
        $this->interact($input, $output);
    }

    // ...

    $statusCode = $this->execute($input, $output);

    return is_numeric($statusCode) ? (int) $statusCode : 0;
}
```

Therefore, our help note was wrong and the method order is ` initialize()` -> `interact()` -> `execute()`

Commits
-------

7afdf50 Fixed the help notes of the AddUser command

Author: javiereguiluz

src/AppBundle/Command/AddUserCommand.php

@@ -61,8 +61,21 @@ protected function configure()
     }
 
     /**
-     * This method is executed before initialize() and execute(). Its purpose is
-     * to check if some of the options/arguments are missing and interactively
+     * This method is executed before the interact() and the execute() methods.
+     * It's main purpose is to initialize the variables used in the rest of the
+     * command methods.
+     *
+     * Beware that the input options and arguments are validated after executing
+     * the interact() method, so you can't blindly trust their values in this method.
+     */
+    protected function initialize(InputInterface $input, OutputInterface $output)
+    {
+        $this->em = $this->getContainer()->get('doctrine')->getManager();
+    }
+
+    /**
+     * This method is executed after initialize() and before execute(). Its purpose
+     * is to check if some of the options/arguments are missing and interactively
      * ask the user for those values.
      *
      * This method is completely optional. If you are developing an internal console
@@ -147,16 +160,6 @@ protected function interact(InputInterface $input, OutputInterface $output)
         }
     }
 
-    /**
-     * This method is executed before the interact() and the execute() methods.
-     * It's main purpose is to initialize the variables used in the rest of the
-     * command methods.
-     */
-    protected function initialize(InputInterface $input, OutputInterface $output)
-    {
-        $this->em = $this->getContainer()->get('doctrine')->getManager();
-    }
-
     /**
      * This method is executed after interact() and initialize(). It usually
      * contains the logic to execute to complete this command task.