Add silent option for gatling karate builder

[ciandt-crodrigues]

Description

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In my scenario, I would like to do a warm-up phase before my real performance test. I'd like to be able to reach all tested flows in order for the server to compile the code beforehand and not affect my response time (useful for .NET and JAVA servers).
For that, I implemented a feature like the .silent on the Gatling HTTP and HTTPProtocol.

I've added a unit test with the warm-up flow for one existing simulation

• Relevant Issues : (compulsory)
• Relevant PRs : (optional)
• Type of change :
  • New feature
  • Bug fix for existing feature
  • Code quality improvement
  • Addition or Improvement of tests
  • Addition or Improvement of documentation

[ptrthomas]

I'm not that familiar with this side of gatling. may I request @f-delahaye to do a review if possible. otherwise this LGTM

[f-delahaye]

Sorry, @ptrthomas , missed your previous comment.

Does this need to be backported in the Java wrapper?

[ptrthomas]

@f-delahaye I will let you take a call on it. it sounds like good to have, but I also think this is not that commonly used

[ptrthomas]

@ciandt-crodrigues I noticed an error in the build which was not failing the build, can you check if this looks ok: 6d80da8

[ciandt-crodrigues]

@ciandt-crodrigues I noticed an error in the build which was not failing the build, can you check if this looks ok: 6d80da8

Sure, I'm busy in the next couple of days, do you have a deadline to go to next release? @ptrthomas

[ptrthomas]

@ciandt-crodrigues no worries - this does not block the release, so take your time