Change sleep to 15ms
Change sleep to 15ms

This is currently the optimal value for this setting based on runc start
times.

Signed-off-by: Michael Crosby <951f4c7b5d47e32d0112c78d14a98eaa23e6b5ef@gmail.com>

docker/containerd,dmcgowan/containerd,rajasec/containerd,hqhq/containerd,miaoyq/containerd,vdemeester/containerd,mikebrow/containerd,kunalkushwaha/containerd,vdemeester/containerd,amitkris/containerd,crosbymichael/containerd,thaJeztah/containerd,xiekeyang/containerd,chanezon/containerd,Wolphin-project/containerd,estesp/containerd,AkihiroSuda/containerd,mikebrow/containerd,miaoyq/containerd,yuexiao-wang/containerd,thaJeztah/containerd,crosbymichael/containerd,dmcgowan/containerd,containerd/containerd,amitkris/containerd,kunalkushwaha/containerd,lichao-mobanche/containerd,estesp/containerd,containerd/containerd