Update git submodules

* Update docs/submodules/yardstick from branch 'stable/euphrates'
  - Bugfix: move opnfv_os-odl-fdio_dvr-noha_daily.yaml to 'test_suites' directory

    The opnfv_os-odl-fdio_dvr-noha_daily.yaml test suite file is wrongly put in Yardstick root directory,
    this patch moves this file to the 'test_suites' directory.

    Change-Id: Ib3f75845c7af658dc6f96ac2de737cfbd1faf15a
    Signed-off-by: JingLu5 <lvjing5@huawei.com>
    (cherry picked from commit 14050ee3f720eb6aafaca256fc7bd982ac127cc7)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index b310586..613e2c7 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit b31058665cf345feb46c371abdfa7bb82cf12936
+Subproject commit 613e2c7387a86f32ae2a5db274ea69f3b24d893d