Encapsulate cleaning function and restructure

geocoder/extension/sql/30_admin1_test.sql

@@ -0,0 +1,18 @@
+-- Check that the geocoding functions are callable, should return NULL
+SELECT (geocode_admin1_polygons(Array['TX','Cuidad Real', 'sevilla'])).*;
+SELECT (geocode_admin1_polygons(Array['NH', 'Vermont'], 'United States')).*;
+SELECT (geocode_admin1_polygons(Array['az', 'az'], Array['Ecuador', 'USA'])).*;
+
+-- Add a few data to the sources
+INSERT INTO global_province_polygons (the_geom, synonyms, iso3) VALUES (
+  '0106000020E610000001000000010300000001000000040000000000000000E000C01F383D7839B740400000000000E000C0AA3C0EDE220F3B4000000000004812404FB7FCCD04893D400000000000E000C01F383D7839B74040',
+  Array['vipava','obcina vipava','vipava, obcina'],
+  'SVN'
+);
+
+-- Check that the synonym function is callable, should return true
+SELECT (geocode_admin1_polygons(Array['obcina vipava'])).success;
+
+-- Check that it returns the mocked geometry above
+SELECT (geocode_admin1_polygons(Array['obcina vipava'])).geom;
+