camera1394: remove trivial dependency on driver_base

[jack-oquin]

The driver_base package is only used by a few drivers and is deprecated for new drivers. Its status is End of Life, but there is currently no plan to delete it, so no big hurry on removing it from camera1394.

The camera1394 dependency is trivial, only using some constant definitions for the driver state and the reconfigure levels.

The only tricky part is that the reconfigure levels must be defined in C++ for the driver and in Python for the Camera1394.cfg script, as is done by the driver_base/SensorLevels ROS message. They could either be hard-coded, or defined in a message defined locally to the driver.