Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge changes from topic 'allow-deployment-overrides'

    * changes:
      xci: infra: bifrost: Avoid installing Ansible twice
      Add initial support for multiple infra deployers

  - xci: infra: bifrost: Avoid installing Ansible twice

    We already install Ansible globally and we also install another version
    of it in the bifrost venv. Even though the OSA Ansible may move faster
    than the bifrost one, we normally pin both projects so we can move them
    when they can work with the same Ansible version. As such, lets make the
    deployment a little bit faster by simply not installing Ansible twice.

    Change-Id: I121ef5979607b62e76300db1bc6d51fc27362d5b
    Signed-off-by: Markos Chandras <mchandras@suse.de>
  - Add initial support for multiple infra deployers

    bifrost is currently the only way to deploy the infrastructure but
    in the future other solutions will be added so we need to do some
    preparation for XCI integration.

    Change-Id: I961dd42157c924d88747074ddba6a318f8b537ac
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index c7fd1fe..346df57 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit c7fd1fe87d8ae59757cefc79fe73ef249dd7952c
+Subproject commit 346df57c53fde3795fbe675477cdb2c1a453b6f7