Decrease the gas required for the module's integration tests to pass.

[dzmitryhil]

Description

Decrease the gas required for the module's integration tests to pass.

• Update funding balances
• Move heavy integration tests to stress tests

Reviewers checklist:

• Try to write more meaningful comments with clear actions to be taken.
• Nit-picking should be unblocking. Focus on core issues.

Authors checklist

• Provide a concise and meaningful description
• Review the code yourself first, before making the PR.
• Annotate your PR in places that require explanation.
• Think and try to split the PR to smaller PR if it is big.

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This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.23%. Comparing base (0bd8960) to head (7be68ed).
Report is 28 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1020      +/-   ##
==========================================
+ Coverage   61.24%   63.23%   +1.99%     
==========================================
  Files         158      158              
  Lines       18329    18329              
==========================================
+ Hits        11226    11591     +365     
+ Misses       6083     5704     -379     
- Partials     1020     1034      +14     

Flag	Coverage Δ
coreum	57.81% <ø> (ø)
coreum-integration-tests-modules	53.05% <ø> (+6.11%)	⬆️

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[masihyeganeh]

Reviewed 10 of 10 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @miladz68 and @ysv)

[miladz68]

Reviewed 10 of 10 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ysv)