Add no duplicate map check in restart

[R4R3D1FF]

What type of PR is this?

What this PR does / why we need it:

Adds 'no duplication' test for each map.

Which issue(s) this PR fixes:
Fixes #799

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[kmesh-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 39.50%. Comparing base (32fe3df) to head (1b0fc5d).
⚠️ Report is 3 commits behind head on main.
see 2 files with indirect coverage changes

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