[apmfasthttp] fix: set response context with closer close

[savsgio]

Fix and set correctly the response context data to the apm transacction after the request finish (included Hijack and Stream connections).

Relationed issue: #1104
Fasthttp issues: valyala/fasthttp#1176, valyala/fasthttp#1199

[apmmachine]

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• Start Time: 2022-02-21T01:22:05.713+0000

• Duration: 44 min 45 sec

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Test	Results
Failed	0
Passed	7356
Skipped	174
Total	7530

🤖 GitHub comments

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[stuartnelson3]

Can you add a test to verify the fixed behavior?

[savsgio]

Can you add a test to verify the fixed behavior?

The test added in #1104 tests the same case!

https://github.com/elastic/apm-agent-go/blob/master/module/apmfasthttp/server_test.go#L36

[axw]

@savsgio the test you reference was succeeding without your change. Please add a test which would fail without your change, and succeeds with your change.

[savsgio]

@axw could you review it again?, please!

[axw]

Thanks @savsgio, I will take a look soon. We have a few other things going on too, so it may take a little while.

[axw]

Thanks for the changes! Looks good apart from the couple of comments I've left.

[savsgio]

@axw Could you review it again? please

[axw]

Sorry for the delay, LGTM. Thanks!

[axw]

/test

[axw]

@savsgio CI is unhappy:

17:47:36  + make install precheck check-modules
17:47:36  go get -v -t ./...
17:47:36  goimports differs:
17:47:36   - module/apmfasthttp/closer.go
17:47:36  Makefile:12: recipe for target 'check-goimports' failed

Please run make fmt to fix this issue, and make check to ensure there are no others.

[axw]

@savsgio the change has broken the apmfiber tests. Can you please take a look at those?

[axw]

/run elasticsearch-ci/docs

[axw]

Thanks @savsgio!

[savsgio]

Thank you so much @axw!