test_client failing with Connext

[dirk-thomas]

See https://github.com/osrf/buildfarmer/issues/84#issuecomment-681015489

Test rcl/test_client failing with Connext on Linux and macOS:

• ci.ros2.org
  • https://ci.ros2.org/view/nightly/job/nightly_linux_debug/1669/testReport/
  • https://ci.ros2.org/view/nightly/job/nightly_linux_release/1652/testReport/
  • https://ci.ros2.org/view/nightly/job/nightly_osx_debug/1749/testReport/
  • https://ci.ros2.org/view/nightly/job/nightly_osx_release/1763/testReport/
• build.ros2.org
  • http://build.ros2.org/view/Rci/job/Rci__nightly-debug_ubuntu_focal_amd64/58/testReport/
  • http://build.ros2.org/view/Rci/job/Rci__nightly-release_ubuntu_focal_amd64/58/testReport/

I would suspect #727 to have caused this regression which also didn't run the tests with Connext.

[brawner]

Addressed over at ros2/rosidl_typesupport_connext#60