Name mismatch between pipeline model and gazebo models

[Jaeyoung-Lim]

Problem Description
The names between the pipeline model / gazebo model don't match.

To keep track, the names are as the following

Model in pipeline / Gazebo model / PX4 airframe config name

• quadrotor_model / iris_aerodynamics / iris
• quadplane_model / standard_vtol_aerodynamics / standard_vtol
• standardplane_model / techpod_aerodynamics / plane or techpod

Proposed Solution

• I don't think it makes much sense to align everything with the PX4 airframe configs since this is vehicle specific
• probably switch model names to quadrotor, standard_vtol, tiltwing_vtol