Merge pull request #642 from k-okada/fix-ci #140

Job	Run time
doc	4m 16s
catkin	5m 9s
osx	6m 30s
linux (ubuntu:trusty)	4m 18s
linux (ubuntu:xenial)	5m 9s
linux (ubuntu:bionic)	5m 14s
linux (ubuntu:bionic, PQP)	5m 18s
linux (ubuntu:bionic, BULLET)	5m 9s
linux (ubuntu:focal)	5m 27s
linux (debian:stretch)	5m 14s
linux (osrf/ubuntu_armhf:trusty)	30m 30s
linux (osrf/ubuntu_armhf:xenial)	33m 6s
linux (osrf/ubuntu_arm64:xenial)	34m 43s
linux (arm64v8/ubuntu:bionic)	19m 32s
linux (arm64v8/ubuntu:focal)	25m 46s
linux (osrf/debian_arm64:stretch)	34m 44s
	3h 50m 5s

Provide feedback