Keep the logs muted if an error occurred

[dgageot]

Fixes #923

Signed-off-by: David Gageot [email protected]

[codecov-io]

Codecov Report

Merging #926 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #926      +/-   ##
==========================================
+ Coverage   41.71%   41.73%   +0.02%     
==========================================
  Files          61       61              
  Lines        2522     2523       +1     
==========================================
+ Hits         1052     1053       +1     
  Misses       1356     1356              
  Partials      114      114

Impacted Files	Coverage Δ
pkg/skaffold/runner/runner.go	54.85% <100%> (+0.25%)	⬆️

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