Add method to set admin meta to DAO

[MrCreosote]

... and alter all the methods that touch object information to copy or return it correctly.

Ideally we would've:

• Made some type of field manager so mongo field lists aren't respecified all over the place
• Added less integration-y tests for the altered methods in MongoWorkspaceDBTest, rather than jamming tests into WorkspaceTest

However, that would have added several days to this project which we don't have.

[codecov[bot]]

Codecov Report

Merging #700 (5dd0d33) into develop (42ae25c) will increase coverage by 0.04%. Report is 10 commits behind head on develop. The diff coverage is 96.29%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #700 +/- ## ============================================= + Coverage 87.47% 87.52% +0.04% - Complexity 5222 5228 +6 ============================================= Files 224 224 Lines 17344 17385 +41 Branches 2560 2561 +1 ============================================= + Hits 15172 15216 +44 Misses 1706 1706 + Partials 466 463 -3 ```