fix(core-snapshots): asset import, include rounds table

[spkjp]

Summary

Fixes assets that were incorrectly imported, because of decamelizeKeys. This PR also changes the SnapshotManager to include the rounds table when taking a snapshot since the PeerVerifier does not work properly without it. Theoretically we could regenerate the rounds table from the blocks and transactions table alone, but it takes approx. 1 hours for mainnet so this is not an option.

This PR invalidates all existing snapshots.

What kind of change does this PR introduce?

• Bugfix
• New feature
• Refactoring / Performance Improvements
• Build-related changes
• Documentation
• Tests / Continuous Integration
• Other, please describe:

Does this PR introduce a breaking change?

• Yes
• No

Does this PR release a new version?

• Yes
  • All tests are passing
  • All benchmarks are passing without any major regressions
  • Sync from 0 works on mainnet
  • Sync from 0 works on devnet
  • Starting a new network and forging on it work
  • Explorer is fully functional
  • Wallets are fully functional
• No

Checklist

• I have read the CONTRIBUTING documentation
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[codecov-io]

Codecov Report

Merging #2502 into master will decrease coverage by 0.08%.
The diff coverage is 18.75%.

@@            Coverage Diff             @@
##           master    #2502      +/-   ##
==========================================
- Coverage   66.07%   65.99%   -0.09%     
==========================================
  Files         400      400              
  Lines        8614     8628      +14     
  Branches      436      395      -41     
==========================================
+ Hits         5692     5694       +2     
- Misses       2877     2890      +13     
+ Partials       45       44       -1

Impacted Files	Coverage Δ
...kages/core-snapshots/src/transport/verification.ts	0% <0%> (ø)	⬆️
packages/core-snapshots/src/manager.ts	0% <0%> (ø)	⬆️
packages/core-snapshots/src/utils.ts	0% <0%> (ø)	⬆️
packages/core-snapshots/src/transport/codec.ts	83.72% <30%> (-16.28%)	⬇️
packages/core-logger-winston/src/formatter.ts	42.85% <0%> (ø)	⬆️

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[ghost]

The ci/circleci: test-node10-integration-2 job is failing as of fb3c21c78c4328c942df30e016ff45f15d705571. Please review the logs for more information.

Once you've pushed the fixes, the build will automatically re-run. Thanks!