made the logger optional in all providers

src/Silex/Application.php

@@ -65,8 +65,6 @@ class Application extends \Pimple implements HttpKernelInterface, TerminableInte
 
         $app = $this;
 
-        $this['logger'] = null;
-
         $this['routes'] = $this->share(function () {
             return new RouteCollection();
         });
@@ -123,6 +121,7 @@ class Application extends \Pimple implements HttpKernelInterface, TerminableInte
         $this['request.https_port'] = 443;
         $this['debug'] = false;
         $this['charset'] = 'UTF-8';
+        $this['logger'] = null;
 
         $this->register(new RoutingServiceProvider());
 

src/Silex/Provider/RememberMeServiceProvider.php

@@ -74,7 +74,7 @@ class RememberMeServiceProvider implements ServiceProviderInterface, EventListen
                     'remember_me_parameter' => '_remember_me',
                 ), $options);
 
-                return new TokenBasedRememberMeServices(array($app['security.user_provider.'.$providerKey]), $options['key'], $providerKey, $options, $app['logger']);
+                return new TokenBasedRememberMeServices(array($app['security.user_provider.'.$providerKey]), $options['key'], $providerKey, $options, isset($app['logger']) ? $app['logger'] : null);
             });
         });
 
@@ -84,7 +84,7 @@ class RememberMeServiceProvider implements ServiceProviderInterface, EventListen
                     $app['security'],
                     $app['security.remember_me.service.'.$providerKey],
                     $app['security.authentication_manager'],
-                    $app['logger']
+                    isset($app['logger']) ? $app['logger'] : null
                 );
 
                 return $listener;

src/Silex/Provider/RoutingServiceProvider.php

@@ -53,7 +53,7 @@ class RoutingServiceProvider implements ServiceProviderInterface, EventListenerP
                 return $app['url_matcher'];
             });
 
-            return new RouterListener($urlMatcher, $app['request_context'], $app['logger'], $app['request_stack']);
+            return new RouterListener($urlMatcher, $app['request_context'], isset($app['logger']) ? $app['logger'] : null, $app['request_stack']);
         });
     }
 

src/Silex/Provider/SecurityServiceProvider.php

@@ -124,7 +124,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                     isset($app['request.http_port']) ? $app['request.http_port'] : 80,
                     isset($app['request.https_port']) ? $app['request.https_port'] : 443
                 ),
-                $app['logger']
+                isset($app['logger']) ? $app['logger'] : null
             );
         });
 
@@ -282,7 +282,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                 $app['security.access_manager'],
                 $app['security.access_map'],
                 $app['security.authentication_manager'],
-                $app['logger']
+                isset($app['logger']) ? $app['logger'] : null
             );
         });
 
@@ -334,7 +334,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                     $app['security'],
                     $userProviders,
                     $providerKey,
-                    $app['logger'],
+                    isset($app['logger']) ? $app['logger'] : null,
                     $app['dispatcher']
                 );
             });
@@ -361,7 +361,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                     $app[$entryPoint],
                     null, // errorPage
                     null, // AccessDeniedHandlerInterface
-                    $app['logger']
+                    isset($app['logger']) ? $app['logger'] : null
                 );
             });
         });
@@ -384,7 +384,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                     $app,
                     $app['security.http_utils'],
                     $options,
-                    $app['logger']
+                    isset($app['logger']) ? $app['logger'] : null
                 );
             });
         });
@@ -416,7 +416,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                     $app['security.authentication.success_handler.'.$name],
                     $app['security.authentication.failure_handler.'.$name],
                     $options,
-                    $app['logger'],
+                    isset($app['logger']) ? $app['logger'] : null,
                     $app['dispatcher'],
                     isset($options['with_csrf']) && $options['with_csrf'] && isset($app['form.csrf_provider']) ? $app['form.csrf_provider'] : null
                 );
@@ -430,7 +430,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                     $app['security.authentication_manager'],
                     $providerKey,
                     $app['security.entry_point.'.$providerKey.'.http'],
-                    $app['logger']
+                    isset($app['logger']) ? $app['logger'] : null
                 );
             });
         });
@@ -440,7 +440,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                 return new AnonymousAuthenticationListener(
                     $app['security'],
                     $providerKey,
-                    $app['logger']
+                    isset($app['logger']) ? $app['logger'] : null
                 );
             });
         });
@@ -488,7 +488,7 @@ class SecurityServiceProvider implements ServiceProviderInterface, EventListener
                     $app['security.user_checker'],
                     $name,
                     $app['security.access_manager'],
-                    $app['logger'],
+                    isset($app['logger']) ? $app['logger'] : null,
                     isset($options['parameter']) ? $options['parameter'] : '_switch_user',
                     isset($options['role']) ? $options['role'] : 'ROLE_ALLOWED_TO_SWITCH',
                     $app['dispatcher']