fix ofa docker build #540

Job	Run time
ros (indigo, true, true, true, ros-ubuntu:14.04-pcl, sudo pip install numpy==1.16.6; sudo pip ins...	1h 48m 15s
ros (kinetic, true, true, true, ros-ubuntu:16.04-pcl, sudo pip install numpy==1.16.6; sudo pip in...	1h 0m 13s
ros (kinetic, true, true, true, ros-ubuntu:16.04-pcl, sudo pip install numpy==1.16.6; sudo pip in...	1h 23m 20s
ros (melodic, true, true, true, ros-ubuntu:18.04-pcl, sudo pip install numpy==1.16.6; sudo pip in...	1h 24m 51s
ros (melodic, true, true, true, ros-ubuntu:18.04-pcl, sudo pip install numpy==1.16.6; sudo pip in...	1h 47m 27s
ros (melodic, true, true, true, ros-ubuntu:18.04-pcl, sudo pip uninstall -y fcn chainer chainercv...	1h 1m 59s
ros (noetic, false, true, true, ros-ubuntu:20.04-pcl, sudo pip3 install numpy==1.17.5 scipy==1.3....	1h 22m 0s
ros (noetic, false, true, true, ros-ubuntu:20.04-pcl, jsk_pcl_ros_utils jsk_pcl_ros, sudo pip3 in...	1h 44m 56s
ros (noetic, false, true, true, ros-ubuntu:20.04-pcl, jsk_recognition_msgs, sudo pip3 install num...	1h 15m 26s
	12h 48m 27s

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