hector_pose_estimation_core: update raw baro height as position.z component in sensor pose

See https://github.com/tu-darmstadt-ros-pkg/hector_localization/commit/bd334f0e30c42fb5833fa8ffa249dfd737d43ddc.
hector_quadrotor_gazebo: set pose_estimation/publish_world_nav_transform parameter to true explicitly