[FIX] ensure_db():

[FIX] ensure_db():
 When user ask a specific database on a new session, the nodb router
 has been used to find the route.
 Depending on installed module in the database, the rendering of the page
 may depend on data injected by the database route dispatcher.
 Thus, we redirect the user to the same page but with the session cookie set.
 This will force using the database route dispatcher...

bzr revid: chs@openerp.com-20140207154703-o0gl58i2b56eridx