Finish adding local IDs to map.json files

data/maps/SlateportCity_BattleTentBattleRoom/map.json

@@ -28,6 +28,7 @@
       "flag": "0"
     },
     {
+      "local_id": "LOCALID_SLATEPORT_TENT_BATTLE_OPPONENT",
       "graphics_id": "OBJ_EVENT_GFX_VAR_0",
       "x": 5,
       "y": 1,
@@ -41,6 +42,7 @@
       "flag": "0"
     },
     {
+      "local_id": "LOCALID_SLATEPORT_TENT_BATTLE_PLAYER",
       "graphics_id": "OBJ_EVENT_GFX_VAR_1",
       "x": 4,
       "y": 8,