Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "rewrite _generate_pod_yaml to combine name and pkey setting"
  - rewrite _generate_pod_yaml to combine name and pkey setting

    just deepcopy and change.  This will probably break in
    the future if we use anything other than dicts and list.

    Change-Id: I9a9b0c5b09b3e3ebd7ed593bf6339ea030605f93
    Signed-off-by: Ross Brattain <ross.b.brattain@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 6628dc3..3953871 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 6628dc3d193a93f9af3295c3e02b0747d8cb73e0
+Subproject commit 395387185000a8d919499e25d7f1915e7a7f56e7