*: use common StopPeerManager to avoid data races

[markya0616]

Before submitting a pull request, please make sure the following is done:

Checklist

• [ ] Fork the repository and create your new branch from master.
• [ ] Please mention the name of community in Pull Request title.
• [ ] Git Commit Messages
  • [ ] Use the present tense (Also in Pull Request title): "Add feature" not "Added feature"
  • [ ] Use the imperative mood (Also in Pull Request title): "Move cursor to..." not "Moves cursor to..."
  • [ ] Use rebase to squash/fixup dummy/unnecessary commits into only one commit.

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -3.55% :warning:

Comparison is base (a914a01) 80.51% compared to head (d286e3c) 76.96%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #273 +/- ## ========================================== - Coverage 80.51% 76.96% -3.55% ========================================== Files 145 145 Lines 11243 11243 ========================================== - Hits 9052 8653 -399 - Misses 1381 1841 +460 + Partials 810 749 -61 ``` [see 13 files with indirect coverage changes](https://app.codecov.io/gh/getamis/alice/pull/273/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=getamis)

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