Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Update: Trex KPI not collected no rabbitmq user"
  - Update: Trex KPI not collected no rabbitmq user

    Update of review #63707: missed yardstick password hash.
    This must be set on top of changes on review.

    JIRA: YARDSTICK-1479

    Change-Id: Ia8783de81ad91ea7421c6bbff87a30c59db2d44c
    Signed-off-by: Stepan Andrushko <stepanx.andrushko@intel.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 5157e77..82f84e0 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 5157e77d7e80796b3ecfe11b8d87e03cf225cb3b
+Subproject commit 82f84e0fe0404fb7d29e50921b6958020967ae5a