Add a RelockDomainAction for future auto-relocks (#485)

* Add a RelockAction and reference to relocks in RegistryLocks

* Respond to CR

- refactor the request param exception logging a bit
- don't log an error if the domain was already locked, just skip

* Save a relock for all locks (if possible)

* derp

* Long -> long + remove unnecessary transact

* semantic merge conflict woo

* fix another semantic merge conflict

db/src/main/resources/sql/flyway/V19__add_registry_relock_reference.sql

@@ -0,0 +1,20 @@
+-- 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 "RegistryLock" ADD COLUMN relock_revision_id bigint;
+
+ALTER TABLE IF EXISTS "RegistryLock"
+  ADD CONSTRAINT FK2lhcwpxlnqijr96irylrh1707
+  FOREIGN KEY (relock_revision_id)
+  REFERENCES "RegistryLock";