feature #13872 [FrameworkBundle] Added domain column when debugging translations (hiddewie)

This PR was merged into the 2.7 branch.

Discussion
----------

[FrameworkBundle] Added domain column when debugging translations

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

This is my first PR. If I do anything wrong, please let me know and I'll try to fix it.

## Possible TODO:
```
[ ] Update relevant documentation
```

## Explanation for the PR:
While editing a web application, I was changing a LOT of translation files. The debug:translation command helps a lot, but it is hard to find out in which domain the missing/unused translations are located. By adding an extra column with the name of the domain, I get more information about the translations in the table.

## New output:
```
+----------+------------+---------------------+----------------------+
| State(s) | Domain     | Id                  | Message Preview (nl) |
+----------+------------+---------------------+----------------------+
| x        | user_admin | user.iban.incorrect | user.iban.incorrect  |
+----------+------------+---------------------+----------------------+

Legend:
 x Missing message
 o Unused message
 = Same as the fallback message
```

Commits
-------

25ef76f [FrameworkBundle] Added domain column when debugging translations

Author: fabpot

Command/TranslationDebugCommand.php

@@ -139,7 +139,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $table = new Table($output);
 
         // Display header line
-        $headers = array('State(s)', 'Id', sprintf('Message Preview (%s)', $locale));
+        $headers = array('State(s)', 'Domain', 'Id', sprintf('Message Preview (%s)', $locale));
         foreach ($fallbackCatalogues as $fallbackCatalogue) {
             $headers[] = sprintf('Fallback Message Preview (%s)', $fallbackCatalogue->getLocale());
         }
@@ -172,7 +172,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                     }
                 }
 
-                $row = array($this->formatStates($states), $this->formatId($messageId), $this->sanitizeString($value));
+                $row = array($this->formatStates($states), $domain, $this->formatId($messageId), $this->sanitizeString($value));
                 foreach ($fallbackCatalogues as $fallbackCatalogue) {
                     $row[] = $this->sanitizeString($fallbackCatalogue->get($messageId, $domain));
                 }