Merge branch '3.4' into 4.2

* 3.4:
  Revert "bug #30620 [FrameworkBundle][HttpFoundation] make session service resettable (dmaicher)"
  [Workflow] Fixed dumping when many transition with same name exist
  fix ConsoleFormatter - call to a member function format() on string

Resources/config/session.xml

@@ -15,7 +15,6 @@
             <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" />