Use RCL_ROS_TIME for message_traits::TimeStamp for Foxy

[pschalkwijk]

Also taken from the rolling branch

• when creating TimeStamp, make sure RCL_ROS_TIME is being used, and not RCL_SYSTEM_TIME.

Signed-off-by: Kenji Brameld [email protected]

• Update include/message_filters/message_traits.h

Co-authored-by: Sivert Havso [email protected]

• add test to ensure message_filters::message_traits::TimeStamp<Msg>::value returns a time with RCL_ROS_TIME time source

Signed-off-by: Kenji Brameld [email protected]

Co-authored-by: Sivert Havso [email protected]

[gbiggs]

This appears to be changing the behaviour of an API. Can you please explain what you are expecting from this change and why it is appropriate to backport it to Foxy?

[ralwing]

FYI This is a backport of https://github.com/ros2/message_filters/pull/72

[quarkytale]

CI:

• Linux
• Linux-aarch64
• Windows