Add letters_as_pdf service permission

migrations/versions/0148_add_letters_as_pdf_svc_perm.py

@@ -0,0 +1,24 @@
+"""empty message
+
+Revision ID: 0148_add_letters_as_pdf_svc_perm
+Revises: 0147_drop_mapping_tables
+Create Date: 2017-12-01 13:33:18.581320
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0148_add_letters_as_pdf_svc_perm'
+down_revision = '0147_drop_mapping_tables'
+
+from alembic import op
+
+
+def upgrade():
+    op.get_bind()
+    op.execute("insert into service_permission_types values('letters_as_pdf')")
+
+
+def downgrade():
+    op.get_bind()
+    op.execute("delete from service_permissions where permission = 'letters_as_pdf'")
+    op.execute("delete from service_permission_types where name = 'letters_as_pdf'")