use xyz instead of xyzrgb in ClusterPointIndicesDecomposer #639

Job	Run time
ros (indigo, true, true, true, ros-ubuntu:14.04-pcl, sudo pip install numpy==1.16.6; sudo pip ins...	8m 24s
ros (kinetic, true, true, true, ros-ubuntu:16.04-pcl, sudo pip install numpy==1.16.6; sudo pip in...	57m 29s
ros (kinetic, true, true, true, ros-ubuntu:16.04-pcl, sudo pip install numpy==1.16.6; sudo pip in...	1h 6m 58s
ros (melodic, true, true, true, ros-ubuntu:18.04-pcl, sudo pip install numpy==1.16.6; sudo pip in...	1h 11m 47s
ros (melodic, true, true, true, ros-ubuntu:18.04-pcl, sudo pip install numpy==1.16.6; sudo pip in...	1h 17m 1s
ros (melodic, true, true, true, ros-ubuntu:18.04-pcl, sudo pip uninstall -y fcn chainer chainercv...	46m 58s
ros (noetic, false, true, true, ros-ubuntu:20.04-pcl, sudo pip3 install numpy==1.17.5 scipy==1.3....	1h 19m 0s
ros (noetic, false, true, true, ros-ubuntu:20.04-pcl, jsk_pcl_ros_utils jsk_pcl_ros, sudo pip3 in...	1h 38m 32s
ros (noetic, false, true, true, ros-ubuntu:20.04-pcl, jsk_recognition_msgs, sudo pip3 install num...	1h 10m 56s
	9h 37m 5s

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