test(core-api): increase coverage to 100%

[sebastijankuzner]

Summary

PR increases core-api coverage to 100%.

Checklist

• Tests
• Ready to be merged

[codecov]

Codecov Report

Merging #3865 into develop will increase coverage by 79.37%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           develop    #3865       +/-   ##
============================================
+ Coverage    12.82%   92.19%   +79.37%     
============================================
  Files          620      620               
  Lines        14845    14840        -5     
  Branches      1847     1842        -5     
============================================
+ Hits          1904    13682    +11778     
+ Misses       12825      946    -11879     
- Partials       116      212       +96     

Flag	Coverage Δ
#functional	6.11% <ø> (+<0.01%)	⬆️
#integration	9.56% <ø> (+<0.01%)	⬆️
#unit	90.61% <ø> (?)

Impacted Files	Coverage Δ
packages/core-api/src/plugins/pagination/config.ts	100.00% <ø> (+25.00%)	⬆️
packages/core-api/src/plugins/pagination/ext.ts	100.00% <ø> (+29.09%)	⬆️
packages/core-api/src/plugins/rate-limit.ts	100.00% <ø> (+19.35%)	⬆️
packages/core-api/src/server.ts	100.00% <ø> (+20.93%)	⬆️
packages/core-p2p/src/hapi-nes/client.ts	2.83% <0.00%> (+2.83%)	⬆️
packages/core-p2p/src/hapi-nes/socket.ts	2.89% <0.00%> (+2.89%)	⬆️
packages/core-p2p/src/hapi-nes/listener.ts	3.93% <0.00%> (+3.93%)	⬆️
...ore-test-framework/src/app/generators/generator.ts	100.00% <0.00%> (+5.88%)	⬆️
packages/core-test-framework/src/utils/api.ts	97.34% <0.00%> (+6.19%)	⬆️
packages/core-api/src/controllers/locks.ts	100.00% <0.00%> (+9.52%)	⬆️
... and 559 more

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