Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Change storperf target IP

    As compass in master use OpenStack Ansible, the former IP "192.168.200.1" for
    Huawei pod-1 has been deprecated.

    Change-Id: Ia60885b36abec3455db2aa2939afbe2ef8bd79f5
    Signed-off-by: JingLu5 <lvjing5@huawei.com>

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index dae41a0..f456d48 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit dae41a002f756d1da65a749bc82eef3ccf4252db
+Subproject commit f456d48971142f0c105142388b2465ee94d91a66