KAZOO-2569: Auto top-up feature
KAZOO-2569: Update specs
KAZOO-2569: Add check for batch transaction process if failed it re write them.
KAZOO-2569: Move auto topup to account crawler
KAZOO-2569: Notify for topup
Merge pull request #425 from 2600hz/KAZOO-2569

KAZOO-2569: Auto top-up feature