Add letter organisation for Companies House

Depends on:
- [ ] https://github.com/alphagov/notifications-template-preview/pull/37

migrations/versions/0114_another_letter_org.py

@@ -0,0 +1,25 @@
+"""empty message
+
+Revision ID: 0114_another_letter_org
+Revises: 0113_job_created_by_nullable
+Create Date: 2017-06-29 12:44:16.815039
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0114_another_letter_org'
+down_revision = '0113_job_created_by_nullable'
+
+from alembic import op
+
+
+def upgrade():
+    op.execute("""
+        INSERT INTO dvla_organisation VALUES
+        ('005', 'Companies House')
+    """)
+
+
+def downgrade():
+    # data migration, no downloads
+    pass