Fix TriggeredPublisher test

[azeey]

🦟 Bug fix

Summary

Fixes TriggeredPublisherTest.InputMessagesTriggerServices test which has been failing since https://github.com/gazebosim/gz-transport/pull/470. The issue is that service requests from the previous test, TriggeredPublisherTest.InvalidServiceName, are received in this test and cause a mismatch on the expected number of received requests. The (hopefully) temporary solution is to sleep a small amount of time right after advertising the service so that the extraneous service requests are received and discarded before we start the main body of the test.

Also see https://github.com/gazebosim/gz-transport/issues/491

Checklist

• [ ] Signed all commits for DCO
• [ ] Added tests
• [ ] Updated documentation (as needed)
• [ ] Updated migration guide (as needed)
• [ ] Consider updating Python bindings (if the library has them)
• [ ] codecheck passed (See contributing)
• [ ] All tests passed (See test coverage)
• [ ] While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[azeey]

@osrf-jenkins run tests please

[azeey]

@j-rivero The Ubuntu build keeps on using prerelease even though I've reverted gz-sim to use the stable repo in https://github.com/gazebo-tooling/gzdev/pull/85. Shouldn't gzdev delete /etc/apt/sources.list.d/_gzdev_*.list and create new ones?

[azeey]

I've made another prerelease of gz-transport13 to workaround the caching issue.

[azeey]

The TriggeredPublisher test is now passing. The other failures on Github Action and windows seem unrelated.

[Blast545]

:farmer: @azeey This one made it back into CI, see:

https://build.osrfoundation.org/job/gz_sim-ci-main-jammy-amd64/65/, https://build.osrfoundation.org/job/gz_sim-ci-main-jammy-amd64/65/testReport/junit/(root)/TriggeredPublisherTest/InputMessagesTriggerServices/

Took some time to check the PRs on gz-transport and gz-sim merged in the last week, but I don't see any reason for it to appear again.