Environment variables not set for actions inside RosTimer

[tonynajjar]

Bug report

Required Info:

• Operating System:
  • Ubuntu 22
• Installation type:
  • binaries
• Version or commit hash:
  • Humble
• DDS implementation:
  • Cyclone
• Client library (if applicable):

Steps to reproduce issue

from launch import LaunchDescription
from launch.actions import (
    GroupAction,
    SetEnvironmentVariable,
)
from launch_ros.actions import Node, RosTimer

def generate_launch_description():  # noqa: D103
    ld = LaunchDescription()
    ld.add_action(
        GroupAction(
            actions=[
                SetEnvironmentVariable(name="ROS_DOMAIN_ID", value="2"),
                RosTimer(
                    period=1.0,
                    actions=[
                        # Gets ROS_DOMAIN_ID of 0
                        Node(
                            package="demo_nodes_py",
                            executable="talker",
                            output="screen",
                        ),
                    ],
                ),
                # Gets ROS_DOMAIN_ID of 2
                Node(
                    package="demo_nodes_py",
                    executable="listener",
                    output="screen",
                ),
            ]
        )
    )

    return ld

Expected behavior

Both nodes get the same ROS_DOMAIN_ID of 2

Actual behavior

The node in RosTimer does not get ROS_DOMAIN_ID set

Additional information

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