Update git submodules

* Update docs/submodules/yardstick from branch 'stable/euphrates'
  - bugfix: tc078 have no data stored or dashboard to show results

    JIRA: YARDSTICK-867

    1.print result in the log, showing the txt format result

    Change-Id: I6deeb4cf44895ef7a6c6d231c77b3843eec285d7
    Signed-off-by: rexlee8776 <limingjiang@huawei.com>
    (cherry picked from commit 36c24ec9fc68c081d0bca507cff3ec81f8a001dc)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index e7338e8..74c0525 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit e7338e897892b3d1c484379d8706e503bde684ab
+Subproject commit 74c0525b9f4ee426fde171d1cefc96dc8d6f3fd1