bug symfony#20422 [Translation][fallback] add missing resources in parent catalogues. (aitboudad)

This PR was merged into the 2.7 branch.

Discussion
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[Translation][fallback] add missing resources in parent catalogues.

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#20420
| License       | MIT
| Doc PR        | ~

Commits
-------

27c91e5 [Translation][fallback] add missing resources in parent catalogues.

Author: fabpot

src/Symfony/Component/Translation/MessageCatalogue.php

@@ -178,6 +178,10 @@ public function addFallbackCatalogue(MessageCatalogueInterface $catalogue)
             if ($c->getLocale() === $catalogue->getLocale()) {
                 throw new \LogicException(sprintf('Circular reference detected when adding a fallback catalogue for locale "%s".', $catalogue->getLocale()));
             }
+
+            foreach ($catalogue->getResources() as $resource) {
+                $c->addResource($resource);
+            }
         } while ($c = $c->parent);
 
         $catalogue->parent = $this;

src/Symfony/Component/Translation/Tests/MessageCatalogueTest.php

@@ -110,18 +110,25 @@ public function testAddFallbackCatalogue()
         $r1 = $this->getMock('Symfony\Component\Config\Resource\ResourceInterface');
         $r1->expects($this->any())->method('__toString')->will($this->returnValue('r1'));
 
-        $catalogue = new MessageCatalogue('en_US', array('domain1' => array('foo' => 'foo'), 'domain2' => array('bar' => 'bar')));
+        $r2 = $this->getMock('Symfony\Component\Config\Resource\ResourceInterface');
+        $r2->expects($this->any())->method('__toString')->will($this->returnValue('r2'));
+
+        $catalogue = new MessageCatalogue('fr_FR', array('domain1' => array('foo' => 'foo'), 'domain2' => array('bar' => 'bar')));
         $catalogue->addResource($r);
 
-        $catalogue1 = new MessageCatalogue('en', array('domain1' => array('foo' => 'bar', 'foo1' => 'foo1')));
+        $catalogue1 = new MessageCatalogue('fr', array('domain1' => array('foo' => 'bar', 'foo1' => 'foo1')));
         $catalogue1->addResource($r1);
 
+        $catalogue2 = new MessageCatalogue('en');
+        $catalogue2->addResource($r2);
+
         $catalogue->addFallbackCatalogue($catalogue1);
+        $catalogue1->addFallbackCatalogue($catalogue2);
 
         $this->assertEquals('foo', $catalogue->get('foo', 'domain1'));
         $this->assertEquals('foo1', $catalogue->get('foo1', 'domain1'));
 
-        $this->assertEquals(array($r, $r1), $catalogue->getResources());
+        $this->assertEquals(array($r, $r1, $r2), $catalogue->getResources());
     }
 
     /**