Bug 30275: (QA follow-up) Rename columns to match API

Bug 30275: (QA follow-up) Rename columns to match API

This patch performs the following column renames:

* id => renewal_id
* issue_id => checkout_id

The idea is that no translation is needed for the API, and also, being a
new table, we can educate the users into the 'to be' terminology we are
leaning towards, instead of having them learn one naming to create
reports and then need to translate them once we normalize things in a
future.

That said, this is simple to review.

Apply this patch and repeat the test plan.

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>