minor #13188 [VarDumper] increase debug.max_items to 2500 (nicolas-grekas)

This PR was merged into the 2.6 branch.

Discussion
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[VarDumper] increase debug.max_items to 2500

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

I see others (and me) hit the 250 limit too many times. The component is able to handle way more items.

Commits
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c40569c [VarDumper] increase debug.max_items to 2500

src/Symfony/Bundle/DebugBundle/DependencyInjection/Configuration.php

@@ -34,7 +34,7 @@ class Configuration implements ConfigurationInterface
                 ->integerNode('max_items')
                     ->info('Max number of displayed items past the first level, -1 means no limit')
                     ->min(-1)
-                    ->defaultValue(250)
+                    ->defaultValue(2500)
                 ->end()
                 ->integerNode('max_string_length')
                     ->info('Max length of displayed strings, -1 means no limit')

src/Symfony/Component/VarDumper/Cloner/AbstractCloner.php

@@ -80,7 +80,7 @@ abstract class AbstractCloner implements ClonerInterface
         ':stream-context' => 'Symfony\Component\VarDumper\Caster\ResourceCaster::castStreamContext',
     );
 
-    protected $maxItems = 250;
+    protected $maxItems = 2500;
     protected $maxString = -1;
 
     private $casters = array();