Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - dynamictp: fix flake8 warning

    flake8 warns about indent

    Change-Id: Ib7a57dcb8462de24a2ccb1fdbc60db995cc60d33
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index a9760ae..631162a 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit a9760ae1ff8cd398ec8c0d950b59f39177c62121
+Subproject commit 631162a347f8bc5f25b04729c29e4948f77b2622