Update git submodules

* Update docs/submodules/yardstick from branch 'stable/euphrates'
  - add scenario opnfv_os-nosdn-bar-ha_daily.yaml for Barometer

    For now just copied and renamed opnfv_os-nosdn-nofeature-ha_daily.yaml

    Change-Id: Idbd37a3e21220aa407d053157da71b449bad15ee
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
  - NSB: count from 0, vnf_0, tg_9, private->uplink, public->downlink

    Also rename private to uplink, public to downlink

    for scale-out template we need to count from 0
    so we can use range() without +1/-1 errors

    vnf_0, vnf_1
    tg_0, tg_1

    also fix Ixia defaults

    Change-Id: I6aecfbb95f99af20f012a9df19c19be77d1b5b77
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
    Signed-off-by: Edward MacGillivray <edward.s.macgillivray@intel.com>
  - apiserver: mock socket.gethostbyname

    we don't want use external DNS requests during unittest

    Change-Id: I5ed67b700ef1dab4b650ae5071a3cf641a17ae4c
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 473fc75..76ce36d 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 473fc755673fec80ad15b55e423b53333a74f164
+Subproject commit 76ce36d88d9bcb274e65ed816f437a31fd2830a1