Fix message for required flags

[gandarez]

This PR fix message for required flags and also reorganize some constants.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 62.69%. Comparing base (8d8ecab) to head (e384f6d).

@@             Coverage Diff             @@
##           develop    #1061      +/-   ##
===========================================
- Coverage    62.70%   62.69%   -0.01%     
===========================================
  Files          382      382              
  Lines        16403    16404       +1     
===========================================
  Hits         10285    10285              
- Misses        5556     5557       +1     
  Partials       562      562              

Flag	Coverage Δ
unittests	62.69% <0.00%> (-0.01%)	⬇️

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Files	Coverage Δ
pkg/ini/ini.go	61.31% <ø> (ø)
pkg/offline/legacy.go	50.00% <ø> (ø)
cmd/logfile/logfile.go	83.33% <0.00%> (ø)
pkg/offline/offline.go	56.41% <0.00%> (ø)
cmd/run.go	43.11% <0.00%> (-0.16%)	⬇️