ibc default genesis state

[fedekunze]

Closes: #6082

Description

cc: @anilcse @aaronc @sahith-narahari

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For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[aaronc]

utACK

[codecov]

Codecov Report

Merging #6139 into master will increase coverage by 0.03%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##           master    #6139      +/-   ##
==========================================
+ Coverage   54.82%   54.85%   +0.03%     
==========================================
  Files         439      439              
  Lines       26498    26501       +3     
==========================================
+ Hits        14527    14537      +10     
+ Misses      10974    10964      -10     
- Partials      997     1000       +3