[FrameworkBundle][HttpFoundation] make session service resettable

Author: dmaicher

Resources/config/session.xml

@@ -15,6 +15,7 @@
             <argument type="service" id="session.storage" />
             <argument type="service" id="session.attribute_bag" />
             <argument type="service" id="session.flash_bag" />
+            <tag name="kernel.reset" method="save" />
         </service>
 
         <service id="Symfony\Component\HttpFoundation\Session\SessionInterface" alias="session" />

composer.json

@@ -23,7 +23,7 @@
         "symfony/dependency-injection": "^3.4.24|^4.2.5",
         "symfony/config": "~3.4|~4.0",
         "symfony/event-dispatcher": "~3.4|~4.0",
-        "symfony/http-foundation": "^3.3.11|~4.0",
+        "symfony/http-foundation": "^3.4.24|^4.2.5",
         "symfony/http-kernel": "~3.4|~4.0",
         "symfony/polyfill-mbstring": "~1.0",
         "symfony/filesystem": "~2.8|~3.0|~4.0",