Merge "Add license and downgrade exception to alembic template"

zuul/driver/sql/alembic/script.py.mako

@@ -1,3 +1,15 @@
+# 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.
+
 """${message}
 
 Revision ID: ${up_revision}
@@ -16,9 +28,9 @@ from alembic import op
 import sqlalchemy as sa
 ${imports if imports else ""}
 
-def upgrade():
+def upgrade(table_prefix=''):
     ${upgrades if upgrades else "pass"}
 
 
 def downgrade():
-    ${downgrades if downgrades else "pass"}
+    raise Exception("Downgrades not supported")