Bring back fw_update_server: in token

app/lib/calculate_upgrade.rb

@@ -1,5 +1,5 @@
 class CalculateUpgrade < Mutations::Command
-    NULL          = Gem::Version::new("0.0.0")
+    NULL          = Gem::Version.new("0.0.0")
     MEDIUM_OLDISH = Gem::Version.new("5.0.9")
     LEGACY_CUTOFF = Gem::Version.new("5.0.6")
 

app/lib/session_token.rb

@@ -39,6 +39,7 @@ class SessionToken < AbstractJwtToken
                 vhost:                 VHOST,
                 mqtt_ws:               MQTT_WS,
                 os_update_server:      url,
+                fw_update_server:      "DEPRECATED",
                 interim_email:         user.email, # Dont use this for anything ever -RC
                 beta_os_update_server: BETA_OS_URL }])
   end