Update git submodules

* Update docs/submodules/yardstick from branch 'stable/danube'
  - Merge "bugfix: fix HA testcases" into stable/danube
  - bugfix: fix HA testcases

    Change-Id: Ib38e94610a108ff7195cefdfaf048e0f4fd894e8
    Signed-off-by: JingLu5 <lvjing5@huawei.com>
    (cherry picked from commit 6604cb5f2d6e3c819cb8488f1ad3468184822cf9)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 6990400..fae70e0 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 6990400d9c020ed0f600e02141efec883593c6c6
+Subproject commit fae70e08d91ff09b175098ef2f0fdef894bbb138