build fails if an action has field that matched the message name

[finostro]

Bug report

If an action definition has a field that matches the msg name then building the bridge fails.
This is if there is a goal field in the action goal or, a feedback in the feedback , etc.
Required Info:

• Operating System: Ubunto 20.04 ros galactic and noetic
• Installation type: source
• Version or commit hash: master
• DDS implementation:rclcpp

Steps to reproduce issue

try to bridge nav2_msgs

Expected behavior

bridge builds fine

Actual behavior

build fails with a " shadows a parameter " error

Additional information

PR #6 fixes this issue