Update D4A Configuration to harmonise with bot mode

Change the default config for D4A to align with bot mode default in mdad. This should also avert a bit of a mess of a potential bug.

roles/custom/matrix-appservice-draupnir-for-all/templates/production-appservice.yaml.j2

@@ -25,7 +25,7 @@ webAPI:
   port: 9000
 
 # The directory the bot should store various bits of information in
-dataPath: "/data/storage"
+dataPath: "/data"
 
 roomStateBackingStore:
   enabled: {{ matrix_appservice_draupnir_for_all_enable_room_state_backing_store }}