Use composite primary key for DomainHistory (#767)

* Use composite primary key for DomainHistory

* Move History table's SequenceGenerator to orm.xml

* Rebase on HEAD and remove default value for key in History tables

* Use primitive type for id.

* Revert the cache change

db/src/main/resources/sql/flyway/V51__use_composite_primary_key_for_domain_history_table.sql

@@ -0,0 +1,34 @@
+-- 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 sequence "history_id_sequence" increment 50;
+
+alter table "DomainHistory" alter column history_revision_id drop default;
+alter table "ContactHistory" alter column history_revision_id drop default;
+alter table "HostHistory" alter column history_revision_id drop default;
+
+alter table if exists "DomainHistoryHost"
+    drop constraint fk6b8eqdxwe3guc56tgpm89atx;
+
+alter table "DomainHistory" drop constraint "DomainHistory_pkey";
+
+alter table "DomainHistory"
+    add constraint "DomainHistory_pkey" primary key (domain_repo_id, history_revision_id);
+
+alter table "DomainHistoryHost" add column domain_history_domain_repo_id text not null;
+
+alter table if exists "DomainHistoryHost"
+    add constraint FKa9woh3hu8gx5x0vly6bai327n
+    foreign key (domain_history_domain_repo_id, domain_history_history_revision_id)
+    references "DomainHistory";