tests: Reduce AMQP & PCNTL Tests flakiness

[PROFeNoM]

Description

I was getting a bit bored of these tests failing here and there in CI jobs... I believe this quick workaround could help us trust the CI a bit more.

The workaround simply consist in retrying the tests, up to five times.

This only affects integration_snapshots-test_integrations

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.78%. Comparing base (6b3218e) to head (2948eb7).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3043      +/-   ##
============================================
- Coverage     74.80%   74.78%   -0.02%     
  Complexity     2784     2784              
============================================
  Files           112      112              
  Lines         11020    11020              
============================================
- Hits           8243     8241       -2     
- Misses         2777     2779       +2     

Flag	Coverage Δ
tracer-php	74.78% <ø> (-0.02%)	⬇️

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see 1 file with indirect coverage changes

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[bwoebi]

Good idea, thank you!

[iamluc]

LGTM, but to make it a bit less intrusive, you could implement it with an annotation on the test, for example using https://gist.github.com/makasim/989fcaa6da8ff579f7914d973e68280c or https://github.com/bshaffer/phpunit-retry-annotations

[PROFeNoM]

Hmmm, it's still failing (example) despite retries... I'll put this back to draft and may investigate further later on.

PS: Note that this still helps with flakiness (amqp example)