Add a failing unit test to make sure that RS_OPTION_R200_DEPTH_UNITS affects rs_get_device_depth_scale(...)
Add a failing unit test to make sure that RS_OPTION_R200_DEPTH_UNITS affects rs_get_device_depth_scale(...)

floe/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,floe/librealsense,IntelRealSense/librealsense,floe/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense