[ignore], [ignore], [kill `cat server-pid client-pid`])
AT_CHECK([ovs-appctl -t "`pwd`"/unixctl -e exit], [0], [ignore], [ignore])
OVS_WAIT_UNTIL([test ! -e server-pid && test ! -e client-pid])
[ignore], [ignore], [kill `cat server-pid client-pid`])
AT_CHECK([ovs-appctl -t "`pwd`"/unixctl -e exit], [0], [ignore], [ignore])
OVS_WAIT_UNTIL([test ! -e server-pid && test ! -e client-pid])