[fix] admin boundary imports

scripts/geodata/osm/osm_admin_boundaries.py

@@ -9,12 +9,12 @@ import array
 import logging
 
 from bisect import bisect_left
+from collections import defaultdict, OrderedDict
 from itertools import izip, combinations
 
 from geodata.coordinates.conversion import latlon_to_decimal
 from geodata.osm.extract import *
 
-
 class OSMAdminPolygonReader(object):
     '''
     OSM relations are stored with pointers to their bounding ways,