fix range of auto_exposure_algo parameter

[mikaelarguedas]

While the enum exposure_algos defines 4 values from 0 to 3:

naoqi_bridge/naoqi_sensors_py/cfg/NaoqiCamera.cfg

Lines 88 to 93 in 2bb282b

	exposure_algos = gen.enum([gen.const("average_scene_brightness", int_t, 0, "Average scene Brightness"),
	gen.const("weighted_average_scene_brightness", int_t, 1, "Weighted average scene Brightness"),
	gen.const("adaptive_weighted_auto_exposure_highlights", int_t, 2, "Adaptive weighted auto exposure for hightlights"),
	gen.const("adaptive_weighted_auto_exposure_lowlights", int_t, 3, "Adaptive weighted auto exposure for lowlights"),
	],
	"Auto Exposure Algorithm")

.

This PR changes the default value from 0 to 3.

This has been flagged by ros/dynamic_reconfigure#111

[nlyubova]

Hi Mikael,
You can merge it on your own :)