Add autoRenewEndTime field to Domain entity (#765)

* Add autoRenewEndTime field to Domain entity

This is the first step towards allowing administrators to selectively disable autorenew.

db/src/main/resources/sql/flyway/V48__domain_add_autorenew_end_time_column.sql

@@ -0,0 +1,17 @@
+-- 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 "Domain" ADD COLUMN autorenew_end_time timestamptz;
+ALTER TABLE "DomainHistory" ADD COLUMN autorenew_end_time timestamptz;
+CREATE INDEX IDXlrq7v63pc21uoh3auq6eybyhl ON "Domain" (autorenew_end_time);