bug symfony#2416 [Icons] Fix LockIconsCommand definition when Iconify disabled (smnandre)

This PR was squashed before being merged into the 2.x branch.

Discussion
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[Icons] Fix LockIconsCommand definition when Iconify disabled

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Issues        | Fix symfony#2415
| License       | MIT

When iconify is disabled, LockIconsCommand definition is accessed without been set first.

Commits
-------

6ba36f7 [Icons] Fix LockIconsCommand definition when Iconify disabled

Author: javiereguiluz

src/Icons/src/DependencyInjection/UXIconsExtension.php

@@ -173,16 +173,15 @@ protected function loadInternal(array $mergedConfig, ContainerBuilder $container
             $container->getDefinition('.ux_icons.iconify_on_demand_registry')
                 ->setArgument(1, $iconSetAliases);
 
+            $container->getDefinition('.ux_icons.command.lock')
+                ->setArgument(3, $mergedConfig['aliases'])
+                ->setArgument(4, $iconSetAliases);
+
             if (!$mergedConfig['iconify']['on_demand']) {
                 $container->removeDefinition('.ux_icons.iconify_on_demand_registry');
             }
         }
 
-        $container->getDefinition('.ux_icons.command.lock')
-            ->setArgument(3, $mergedConfig['aliases'])
-            ->setArgument(4, $iconSetAliases)
-        ;
-
         if (!$container->getParameter('kernel.debug')) {
             $container->removeDefinition('.ux_icons.command.import');
         }