records_sensor_data test is flaky

[tfoote]

Description

records_sensor_data test fails about once per week in nightly builds: https://ci.ros2.org/job/nightly_linux-aarch64_repeated/1590/testReport/rosbag2_transport/RecordIntegrationTestFixture/records_sensor_data/history/

Expected Behavior

It should pass every nightly.

Actual Behavior

Be repeatable.

To Reproduce

Run the CI repeated nightly tests: https://ci.ros2.org/job/nightly_linux-aarch64_repeated/

System (please complete the following information)

• OS: Ubuntu Focal
• ROS 2 Distro: Nightly
• Version: head

Additional context

• From the buildfarmer monitoring.

[Barry-Xu-2018]

This problem maybe similar to #790.
While publisher sends messages, subscription of rosbag may not connect to publisher.

Unfortunately, I cannot reproduce this after run test_record 100 times in my local environment.
After fixing #790, I can update test codes of test_record.

[MichaelOrlov]

• Closing as not reproducible any more