bug #12574 There is no handler file in storage (alihasana)

This PR was merged into the 4.3 branch.

Discussion
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There is no handler file in storage

Hi team,
There is no createTable method in handler, because handle is folder now, but there is createTable in PdoSessionHandler

So i request you to verify and approve my request

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Commits
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a620020 There is no handler file in storage

Author: OskarStark

doctrine/pdo_session_storage.rst

@@ -184,7 +184,7 @@ Preparing the Database to Store Sessions
 
 Before storing sessions in the database, you must create the table that stores
 the information. The session handler provides a method called
-:method:`Symfony\\Component\\HttpFoundation\\Session\\Storage\\Handler::createTable`
+:method:`Symfony\\Component\\HttpFoundation\\Session\\Storage\\Handler\\PdoSessionHandler::createTable`
 to set up this table for you according to the database engine used::
 
     try {