Update git submodules

* Update docs/submodules/yardstick from branch 'stable/euphrates'
  - CI: add new test cases into CI so they can have result

    Change-Id: Ib2b165c41121b29b2af378dc420c2360786de3f0
    Signed-off-by: rexlee8776 <limingjiang@huawei.com>
    (cherry picked from commit 4aecf8839e12260284603266c4b93dc72b33ea36)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 8aaa7d2..898cd51 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 8aaa7d27cd491e8a78421ffcf0af01e6101a0bf4
+Subproject commit 898cd51e6f55a32e882fba86f5dac32e6d89b1ca