Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "prox: pass prox_config_dict between Processes using queue"
  - prox: pass prox_config_dict between Processes using queue

    we generate the prox_config_dict in the _run Process,
    but we also need it in the _traffic_runner Process to
    get core info.

    use a queue to pass the config list between the processes

    enable collect_kpi

    Change-Id: Ibaf41d606e559a87addf43d6ddaed206dbd2d20c
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>
    Signed-off-by: Edward MacGillivray <edward.s.macgillivray@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index f410ec7..9a8de3b 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit f410ec7c420632a4596c14e05f8a9650b5d84803
+Subproject commit 9a8de3b337c45da22706cac29bc31cda9cf63fa9