Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "vFW scale-up template."
  - vFW scale-up template.

    Added topology and traffic profile templates
    Added support for using JinJa2 templates in topology definition
    Added support for static pipeline configs for SampleVNFs

    JIRA: YARDSTICK-1043

    Change-Id: Iab99fd5b5ad69ca32ee70b9fe47779387ad27e7f
    Signed-off-by: Chornyi, TarasX <tarasx.chornyi@intel.com>
    Signed-off-by: Mytnyk, Volodymyr <volodymyrx.mytnyk@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index ec243be..6289ae8 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit ec243be6d3f3dc3e811e9217209a8c692e3f9c64
+Subproject commit 6289ae851034b987bf5b69a4e38a5027d358e9d8