minor #5174 [CookBook] [configuration_organization] Use $this->getRootDir() instead of __DIR__ (manelselles)

This PR was merged into the 2.3 branch.

Discussion
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[CookBook] [configuration_organization] Use $this->getRootDir() instead of __DIR__

Commits
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0209681 Update configuration_organization.rst

Author: wouterj

cookbook/configuration/configuration_organization.rst

@@ -23,7 +23,7 @@ class::
 
         public function registerContainerConfiguration(LoaderInterface $loader)
         {
-            $loader->load(__DIR__.'/config/config_'.$this->getEnvironment().'.yml');
+            $loader->load($this->getRootDir().'/config/config_'.$this->getEnvironment().'.yml');
         }
     }
 
@@ -101,7 +101,7 @@ method::
 
         public function registerContainerConfiguration(LoaderInterface $loader)
         {
-            $loader->load(__DIR__.'/config/'.$this->getEnvironment().'/config.yml');
+            $loader->load($this->getRootDir().'/config/'.$this->getEnvironment().'/config.yml');
         }
     }
 
@@ -199,7 +199,7 @@ make Symfony aware of the new file organization::
 
         public function registerContainerConfiguration(LoaderInterface $loader)
         {
-            $loader->load(__DIR__.'/config/environments/'.$this->getEnvironment().'.yml');
+            $loader->load($this->getRootDir().'/config/environments/'.$this->getEnvironment().'.yml');
         }
     }