Update git submodules

* Update docs/submodules/yardstick from branch 'stable/fraser'
  - Bugfix: docker build failed

    Due to no inventory.ini specified in Dockerfile, which
    resulsts in ansible-playbook run fail

    JIRA: YARDSTICK-1277

    Change-Id: Iaf689b71b8c86b54b2451d8a8c480f7d94d53561
    Signed-off-by: rexlee8776 <limingjiang@huawei.com>
    (cherry picked from commit ce9a39a0e9e2747afa722f360ddc74dc697b3217)

diff --git a/docs/submodules/yardstick b/docs/submodules/yardstick
index 02f4d1c..c45a1d6 160000 (submodule)
--- a/docs/submodules/yardstick
+++ b/docs/submodules/yardstick
@@ -1 +1 @@
-Subproject commit 02f4d1c0ff5583177cd65d6fc60a116ca109adc8
+Subproject commit c45a1d66e51e8eb5f0a55193dfe4993dfc793dc6