Keepers 2b0ccdc8de
require complete previous data for increment (#1869)
## Description

If an exchange collection only has previous
delta info, or only previous path info, and not
the other, remove that entry from the parsed
metadata map, causing a full backup of the
containere.

## Does this PR need a docs update or release note?

- [x]  No 

## Type of change

- [x] 🌻 Feature

## Issue(s)

* #1804

## Test Plan

- [x]  Unit test
2022-12-20 01:31:30 +00:00
..