Return error instead of killing process

[vvakar]

Rather than kill the whole load test (which is what log.Fatal does), proposing to delegate error handling so user can decide on:

• retry policy
• tracking error/retry metrics
• finer-grained error handling policy

[CLAassistant]

All committers have signed the CLA.

[pablochacin]

Hi @vvakar Thanks for your interest in contributing to the project.
The changes you propose are breaking changes making any existing test that uses this extension to change their behavior.

I think it would be better to add an option that controls this behavior and ensure the current behavior is the default. For example, add the option ContinueOnError and

if err != nil && !opts.ContinueOnError then {
  		log.Fatal(err.Error() + " on command: " + name + " " + strings.Join(args, " "))
 }
 return string(out), err

[vvakar]

Hi @pablochacin, point well taken! I'll make that change.

[pablochacin]

LGTM

[vvakar]

Thanks for approving @pablochacin! Pls note - I don't have write access to merge the PR.