Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "Move bootstrap-scenarios.yml to common playbooks directory"
  - Move bootstrap-scenarios.yml to common playbooks directory

    Move bootstrap-scenarios.yml from installer/osa/playbooks/bootstrap-scenarios.yml
    to playbooks/bootstrap-scenarios.yml as a common playbook.
    So we can use this file to bootstarap k8s-* scenarios, instead of creating a new
    file under installer/kubespray/playbooks/bootstrap-scenarios.yml

    Change-Id: Ic31ee00e1a0863f48fb86298d7c00fa8420fa28a
    Signed-off-by: wutianwei <wutianwei1@huawei.com>