sys: clean up process after test
sys: clean up process after test

Signed-off-by: Shengjing Zhu <2dd997cfa01a89f57dd2ea7f2dd61043cc88e07b@debian.org>

estesp/containerd,dmcgowan/containerd,vdemeester/containerd,thaJeztah/containerd,crosbymichael/containerd,crosbymichael/containerd,mikebrow/containerd,containerd/containerd,thaJeztah/containerd,dmcgowan/containerd,mikebrow/containerd,vdemeester/containerd,estesp/containerd,containerd/containerd