Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Rename ResourceProfile.check_if_sa_running()

    * Update log message and rename method to make debugging easier
    * Fix pep8 violations in touched files

    JIRA: YARDSTICK-859

    Change-Id: Id138d72cd8557ffacd5dcc81d06feeb484e13625
    Signed-off-by: Emma Foley <emma.l.foley@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 36f0563..12aaf2f 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 36f0563490a4ee8f5b30eb7fe51a62d3b55c5b32
+Subproject commit 12aaf2fd5a8511570fa20d9a5ca3643113475f24