tests/semaphore.test.bash: use "sudo" for docker, clean up
tests/semaphore.test.bash: use "sudo" for docker, clean up

Signed-off-by: Gyuho Lee <3454051ee3341eb69bdf6fca40899cdad4d86496@gmail.com>

ajityagaty/etcd,ajityagaty/etcd,sinsharat/etcd,rnaveiras/etcd,bdarnell/etcd,dannysauer/etcd,cockroachdb/etcd,mkumatag/etcd,mkumatag/etcd,ajityagaty/etcd,mqliang/etcd,joshix/etcd,xiang90/etcd,cockroachdb/etcd,li-ang/etcd,sinsharat/etcd,etcd-io/etcd,mkumatag/etcd,mqliang/etcd,vimalk78/etcd,joshix/etcd,coreos/etcd,vimalk78/etcd,xiang90/etcd,rnaveiras/etcd,li-ang/etcd,etcd-io/etcd,etcd-io/etcd,gyuho/etcd,mqliang/etcd,dannysauer/etcd,coreos/etcd,rnaveiras/etcd,gyuho/etcd,bdarnell/etcd