fix shell errors from shellcheck

[albertodonato]

No description provided.

[zyga]

Looks good, thank you for the PR

[sergiocazzolato]

Lgtm, thanks for the improvements..

[codecov-io]

Codecov Report

Merging #4032 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4032      +/-   ##
==========================================
- Coverage   75.88%   75.88%   -0.01%     
==========================================
  Files         431      431              
  Lines       36915    36915              
==========================================
- Hits        28014    28012       -2     
- Misses       6948     6950       +2     
  Partials     1953     1953

Impacted Files	Coverage Δ
overlord/ifacestate/helpers.go	62.33% <0%> (-0.67%)	⬇️

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