Update git submodules

* Update docs/submodules/yardstick from branch 'stable/gambia'
  - Merge "Add Testcase for Prox Standalone SRIOV." into stable/gambia
  - Add Testcase for Prox Standalone SRIOV.

    No sample testcase for prox SRIOV standalone.

    Renamed pod file so that other prox testcases can use this file

    JIRA: YARDSTICK-1471

    Change-Id: Icc20e395a3fb4c9d1398f85198d64682b2a9ee33
    Signed-off-by: Carey, Alan <alan.carey@intel.com>
    (cherry picked from commit 0eaa53d46f1f2ced9a1d40ebf820580bf314b4a1)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 528234b..ec17200 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 528234b9906fb0791b7fc2b398e17bc67204aebb
+Subproject commit ec172003f44c60fcc2cb16d669815a3b134bb113