Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Bugfix: HA kill process recovery has a conflict"
  - Bugfix: HA kill process recovery has a conflict

    It happens in Nokia SUT when running in the Plugfest. The problem happens when
    the start_process start to recover the killed process (like nova-api), but the
    self-cured mechanism already recovered. And somehow it lead to a conflict and
    has problems.
    So the recover of the HA attack-recover should be improved to only recover it
    when it needs to.

    JIRA: YARDSTICK-1222

    Change-Id: I1acb5a7d59d6fe4e0de0b0c5942fa89e051dd1ff
    Signed-off-by: rexlee8776 <limingjiang@huawei.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index da8e2c8..b069955 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit da8e2c813048e70956e6dcb54b997e8e6bfb9ebf
+Subproject commit b0699552d6b308d6ce458c456a3ece99ae9069a6