Update git submodules

Update git submodules

* Update docs/submodules/yardstick from branch 'master'
  - Merge "Kubernetes context adoption when run in CI"
  - Kubernetes context adoption when run in CI

    JIRA: YARDSTICK-801

    We need kubernetes test case run in CI.
    We have one scenario k8-nosdb-lb-noha for kubernetes.
    But for now, we need to do some adoption in CI script.

    Also I move check OS_AUTH_URL in heat.py.

    Change-Id: Iff86caf77fd74e70469ad2dc43f2238097ce0001
    Signed-off-by: chenjiankun <chenjiankun1@huawei.com>