Migrate camera, multicamera, laser and depthcamera example models to use gazebo_yarp_robotinterface plugin

[traversaro]

By using the gazebo_yarp_robotinterface plugin, it is possible to avoid the use of implict network wrappers that will be removed in gazebo-yarp-plugins 5 (see #594).

This PR requires to merge before:

• Cleanup of model tutorials #613
• gazebo_yarp_camera: Parse yarpDeviceName to support use with gazebo_yarp_robotinterface #614

Furthermore, it also contains the following minor fixes:

• laser: Improve size error message with got and expected sizes ( 4a5d167 )
• Avoid the need to specify redundant device name in camera and multicamera devices ( b745de8 )

[Nicogene]

If you tested the plugins and they work fine we can merge it

[traversaro]

If you tested the plugins and they work fine we can merge it

Yes, I tested them and I checked that the port were publishing something.