Add Integration Tests for CLI and Genesis

[defihyung]

Description

closes: #191

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• Targeted PR against correct branch (see CONTRIBUTING.md)
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• Code follows the module structure standards.
• Wrote unit and integration tests
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• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
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• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #204 (a584278) into develop (63b6a90) will decrease coverage by 0.16%.
The diff coverage is n/a.

❗ Current head a584278 differs from pull request most recent head 9352b3e. Consider uploading reports for the commit 9352b3e to get more accurate results

@@             Coverage Diff             @@
##           develop     #204      +/-   ##
===========================================
- Coverage    83.60%   83.43%   -0.17%     
===========================================
  Files           20       20              
  Lines         2300     2349      +49     
===========================================
+ Hits          1923     1960      +37     
- Misses         203      209       +6     
- Partials       174      180       +6     

Impacted Files	Coverage Δ
x/liquidity/keeper/invariants.go	58.78% <0.00%> (-0.82%)	⬇️
x/liquidity/keeper/liquidity_pool.go	77.92% <0.00%> (-0.67%)	⬇️
x/liquidity/types/params.go	100.00% <0.00%> (ø)
x/liquidity/keeper/genesis.go	80.95% <0.00%> (ø)
x/liquidity/types/swap.go	81.81% <0.00%> (+0.06%)	⬆️
x/liquidity/keeper/batch.go	90.90% <0.00%> (+0.28%)	⬆️
x/liquidity/keeper/swap.go	85.82% <0.00%> (+1.69%)	⬆️

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[defihyung]

In Makefile, test-uinit and test-cover both have $(PACKAGES_NOSIMULATION) but don't exclude simulation testing so I excluded simulation testing when running .

[dongsam]

LGTM, Thank you for your hard work,
could you include also genesis export/init integration test cases in this PR?

[defihyung]

The integration tests for initializing and exporting genesis will be handled in the other PR.