Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Corrected scale-up command line arguments

    Change-Id: If308fde797dcb01e58f37ad81bb116fde542366a
    Signed-off-by: Chornyi, TarasX <tarasx.chornyi@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 145b9b8..5fa31a4 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 145b9b8e3b109f08ae2cfee6d0a81956ebd91860
+Subproject commit 5fa31a4e78b9421615ef81c8392e30179d49e1cb