Fixing variable names in db/v2/sqlalchemy/api.py
Fixing variable names in db/v2/sqlalchemy/api.py

Change-Id: Ie63d8dcca74b1bb9e689977723108079aaa2215d

openstack/mistral,dennybaa/mistral,StackStorm/mistral,StackStorm/mistral,openstack/mistral,dennybaa/mistral