transact_upsert helper does not work as expected

I made a mistake in my understanding of the transact write feature of Dynamodb, I need to review the transact_upsert function in dynamodb.py to make sure that it does what I think.

I thought that transact write didn't completely cancel everything if one condition is not met on one item... it does.

I need to update it to include some sort of ignore_failures and retry logic, or just go for a different approach.

Temp fix for one implementation in tickets api when creating a ticket, ticket child, and customer.