Add Vat heal integration test

db/migrations/1539809713_update_vat_heal_rad_type.down.sql

@@ -0,0 +1 @@
+ALTER TABLE maker.vat_heal ALTER COLUMN rad SET DATA TYPE int;

db/migrations/1539809713_update_vat_heal_rad_type.up.sql

@@ -0,0 +1 @@
+ALTER TABLE maker.vat_heal ALTER COLUMN rad SET DATA TYPE numeric;

db/schema.sql

@@ -815,7 +815,7 @@ CREATE TABLE maker.vat_heal (
     header_id integer NOT NULL,
     urn character varying,
     v character varying,
-    rad integer,
+    rad numeric,
     tx_idx integer NOT NULL,
     raw_log jsonb
 );