Fix for keys parse bug

[okwme]

Closes: #XXX

Description

Fixes gaiad keys parse <input>. Bug reported here and here and PR against Cosmos SDK that demonstrates fix here.

Otherwise the gaiad keys parse <input> command hangs indefinitely.

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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)

[codecov]

Codecov Report

Merging #884 (04d412f) into main (94a30c6) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##            main    #884      +/-   ##
========================================
- Coverage   0.41%   0.39%   -0.02%     
========================================
  Files          7       7              
  Lines        483     505      +22     
========================================
  Hits           2       2              
- Misses       480     502      +22     
  Partials       1       1