Vat heal (#56)

* VatHeal Converter

* Add VatHeal repository

* Add VatHeal transformer

* Add VatHeal to continuousLogSync command

* Mark vat_init_checked as true when creating vat init records

* Update urn and v converting

* Return error if Repository.MarkCheckedHeader fails

* Add deleting vat heal from test cleanup method

test_config/test_config.go

@@ -97,6 +97,7 @@ func CleanTestDB(db *postgres.DB) {
 	db.MustExec("DELETE FROM maker.price_feeds")
 	db.MustExec("DELETE FROM maker.tend")
 	db.MustExec("DELETE FROM maker.vat_grab")
+	db.MustExec("DELETE FROM maker.vat_heal")
 	db.MustExec("DELETE FROM maker.vat_init")
 	db.MustExec("DELETE FROM maker.vat_fold")
 	db.MustExec("DELETE FROM maker.vat_toll")