Add gz_frame_id's to sensors

[TannerGilbert]

Adds gz_frame_id to sensors to ensure the ROS topics have the correct frame_id.

[dakejahl]

Thanks. We will need to come back to this and rename to frame_id once it's fully removed

See gazebosim/sdformat#1454 for details

Ardupilot does this ArduPilot/ardupilot_gazebo#131

[TannerGilbert]

@dakejahl thanks for the quick feedback. The formatting of the models is quite different in some files (spaces vs. tabs etc.). I made two commits. The first only updated the rover_ackermann that had the formatting issues you mentioned. The second updates all model files to have consistent formatting which might not be wanted in this PR. Please tell me if it would be more desirable to remove the last commit or not. Best regards, Gilbert

[dakejahl]

Awesome thank you! All of the files are missing newlines and the end and github doesn't like that