TestClient.test_service_timestamps failing consistently. (backport #1364)

[mergify[bot]]

closes https://github.com/ros2/rclpy/issues/1347

note: backport all distros.

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This is an automatic backport of pull request #1364 done by Mergify.

[ahcorde]

Pulls: ros2/rclpy#1367 Gist: https://gist.githubusercontent.com/ahcorde/c505e3bd80f665931a078c6fe98e40d3/raw/fbf77aae149c952f8223d2cae29ba2abc17530e8/ros2.repos BUILD args: --packages-up-to rclpy --packages-above-and-dependencies rclpy TEST args: --packages-select rclpy --packages-above rclpy ROS Distro: jazzy Job: ci_launcher ci_launcher ran: https://ci.ros2.org/job/ci_launcher/14641

• Linux
• Linux-aarch64
• Linux-rhel
• Windows