tree 893fd8353518166218301934d7c482992c47de35
parent 2a478fae4698bafabbb22e6da74a0153d8662afc
author Sumir Kataria <sumir@google.com> 1520371940 -0800
committer Sumir Kataria <sumir@google.com> 1520454140 -0800

Change prune criteria.

- Add and enforce minimum retention time.
- Don't delete work if it has active dependents.

Test: added and ran tests.

Change-Id: Ia67dca28db23f60c5686eef8176fd66c44bf0db5