Change database migration version to ussuri

Change-Id: Ic80b169d34ae9adc6d1329785f80a0d27d2cb241

glance/db/migration.py

@@ -47,9 +47,9 @@ def get_backend():
 # Migration-related constants
 EXPAND_BRANCH = 'expand'
 CONTRACT_BRANCH = 'contract'
-CURRENT_RELEASE = 'train'
+CURRENT_RELEASE = 'ussuri'
 ALEMBIC_INIT_VERSION = 'liberty'
-LATEST_REVISION = 'rocky_contract02'
+LATEST_REVISION = 'train_contract01'
 INIT_VERSION = 0
 
 MIGRATE_REPO_PATH = os.path.join(

glance/db/sqlalchemy/alembic_migrations/data_migrations/ussuri_migrate01_empty.py

@@ -0,0 +1,26 @@
+# Copyright (C) 2020 RedHat Inc.
+# 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.
+
+
+def has_migrations(engine):
+    """Returns true if at least one data row can be migrated."""
+
+    return False
+
+
+def migrate(engine):
+    """Return the number of rows migrated."""
+
+    return 0

glance/db/sqlalchemy/alembic_migrations/versions/ussuri_contract01_empty.py

@@ -0,0 +1,25 @@
+# Copyright (C) 2020 RedHat Inc
+# 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.
+
+
+# revision identifiers, used by Alembic.
+revision = 'ussuri_contract01'
+down_revision = 'train_contract01'
+branch_labels = None
+depends_on = 'ussuri_expand01'
+
+
+def upgrade():
+    pass

glance/db/sqlalchemy/alembic_migrations/versions/ussuri_expand01_empty.py

@@ -0,0 +1,30 @@
+# Copyright (C) 2020 RedHat Inc
+#    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.
+
+"""empty expand for symmetry with ussuri_expand01
+
+Revision ID: ussuri_expand01
+Revises: train_expand01
+Create Date: 2020-01-03 11:55:16.657499
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'ussuri_expand01'
+down_revision = 'train_expand01'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    pass

glance/tests/functional/db/migrations/test_train_migrate01.py

@@ -81,7 +81,7 @@ class TestTrainMigrate01Mixin(test_migrations.AlembicMigrationsMixin):
             self.assertIn('"backend":', row['meta_data'])
 
         # run data migrations
-        data_migrations.migrate(engine)
+        data_migrations.migrate(engine, release='train')
 
         # check that meta_data has 'backend' key replaced with 'store'
         rows = (image_locations.select()