Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Bugfix: Add opnfv_os-odl_l2-moon-ha_daily testsuite for Compass4nfv

    Change-Id: I46c6b56e1293c3d594804d77a73c391922f03653
    Signed-off-by: JingLu5 <lvjing5@huawei.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index fd4a6ba..8eaffb5 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit fd4a6ba9f80e2f96af189097ccd478389467ada3
+Subproject commit 8eaffb5e7d9f58bc698855fc149fdfd1758f48c2