R4R: Governance BFT Time

[sunnya97]

closes #2195

• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added entries in PENDING.md with issue #

• rereviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #2217 into develop will increase coverage by 0.19%.
The diff coverage is 90.9%.

@@             Coverage Diff             @@
##           develop    #2217      +/-   ##
===========================================
+ Coverage    63.98%   64.18%   +0.19%     
===========================================
  Files          140      140              
  Lines         8608     8566      -42     
===========================================
- Hits          5508     5498      -10     
+ Misses        2723     2692      -31     
+ Partials       377      376       -1

[alexanderbez]

utACK 👍

[cwgoes]

Mostly LGTM, a few questions.

[cwgoes]

@sunnya97 Looks like this made develop non-deterministic (CI didn't catch on this PR for some reason) - any ideas?