Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Improve OVS-DPDK setup process"
  - Improve OVS-DPDK setup process

    Improved OVS-DPDK setup process:
    - Added log string for each command executed.
    - Removed unnecessary 'kill' command.
    - Check if commands are executed correctly.

    JIRA: YARDSTICK-922

    Change-Id: I09fba96ffa39cde1e000a3c4382d474219c99985
    Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index daf594d..c07a248 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit daf594dd65a8a22bf8aaaf4d56df5ff965a15749
+Subproject commit c07a248d10a4cd3c451983a9856eec590e2bfd3d