Allow multiple threat types in the Spec11ThreatMatch table (#650)

* Update to generic Spec11ThreatMatch table

* Fix SQL syntax

* Make changes to the schema and add a test for null and empty threatTypes

* Fix a small typo

* Change the exception thrown with illegal arguments

Change the import for isNullOrEmpty

* Fix import for checkArgument

* Added a threat to test multiple threat types

db/src/main/resources/sql/flyway/V37__update_spec11threatmatch.sql

@@ -0,0 +1,31 @@
+-- Copyright 2020 The Nomulus Authors. All Rights Reserved.
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+
+alter table if exists "SafeBrowsingThreat"
+  rename to "Spec11ThreatMatch";
+
+alter table if exists "Spec11ThreatMatch"
+  alter column "threat_type" type text[] using threat_type::text[];
+
+alter table if exists "Spec11ThreatMatch"
+  rename column "threat_type" to "threat_types";
+
+alter index if exists "safebrowsing_threat_registrar_id_idx"
+  rename to "spec11threatmatch_registrar_id_idx";
+
+alter index if exists "safebrowsing_threat_tld_idx"
+  rename to "spec11threatmatch_tld_idx";
+
+alter index if exists "safebrowsing_threat_check_date_idx"
+  rename to "spec11threatmatch_check_date_idx";