Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Add common openstack opertation scenarios: subnet & port"
  - Add common openstack opertation scenarios: subnet & port

    JIRA: YARDSTICK-781

    This patch adds some common openstack opertation scenarios

    Change-Id: Ie59f0d5ae0842f8347824c961436b889a95b1a72
    Signed-off-by: JingLu5 <lvjing5@huawei.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 9da77e9..b82340a 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 9da77e9572bc9bd90b3978713b197339480a4a74
+Subproject commit b82340a4e3b63b38fe3b797070baacfb70a6df38