[ovs-git] [openvswitch/ovs] 0c5a65: system-traffic: Make nsh test more robust.

[William Tu]

  Branch: refs/heads/master
  Home:   https://github.com/openvswitch/ovs
  Commit: 0c5a65f20e5bca4cfefe70e69d8e7499799f77e7
      https://github.com/openvswitch/ovs/commit/0c5a65f20e5bca4cfefe70e69d8e7499799f77e7
  Author: William Tu <u9012063 at gmail.com>
  Date:   2019-07-22 (Mon, 22 Jul 2019)

  Changed paths:
    M tests/system-traffic.at

  Log Message:
  -----------
  system-traffic: Make nsh test more robust.

The patch adds '-n' to tcpdump to avoid address coverting. Add '-l' for rhel8
to avoid buffering. Since '-U' is used to output to stdout, simply use 'cat'
to search result.  Use OVS_WAIT_UNTIL instead of sleep, and also remove/add
some newlines. Finally, move tcpdump captured interface into the namespace,
(capture p1 instead of ovs-p1), and tested using af_xdp.

Signed-off-by: William Tu <u9012063 at gmail.com>
Signed-off-by: Ilya Maximets <i.maximets at samsung.com>