Use both ROS package and message name for unique mappings

[oysstu]

Summary

This prepends the ROS package name before the message name to avoid problems with collision when two distinct packages declare the same message name. Any custom message package declaring Imu.msg will not compile as the generated publishers, subscribers, and tests will have the same names in the following files.

• ros_gz_bridge/generated/test/ros_publisher.cpp
• ros_gz_bridge/generated/test/gz_subscriber.cpp
• ros_gz_bridge/generated/test/gz_publisher.cpp

Example: custom_msgs/msg/Imu.msg will collide with sensor_msgs/msg/Imu.msg in the declarations of

• ros_publisher.cpp
  • auto imu_imu_pub
  • custom_msgs::msg::Imu imu_imu_msg
• gz_subscriber.cpp
  • TEST(GzSubscriberTest, imu_imu)
• gz_publisher.cpp
  • auto imu_imu_pub
  • gz::msgs::IMU imu_imu_msg

This commit adds the package name to the unique name generation, such that
auto imu_imu_pub becomes auto imu_sensor_msgs_imu_pub

Checklist

• [X ] Signed all commits for DCO
• [N/A] Added tests
• [N/A] Updated documentation (as needed)
• [N/A] Updated migration guide (as needed)
• [N/A] Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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[ahcorde]

@mjcarroll do you mind to take a quick look ?