Update git submodules

Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "Generate and use certificates for OSA"
  - Generate and use certificates for OSA

    Instead of making OSA to generate self signed certs, bring our
    own and pass them.
    By this way we will be able to trust in that certs, and start
    consuming OpenStack easily.

    It will also generate proper openrc file to source it and start
    consuming the cloud properly.

    Change-Id: Ic72a8b05e6efb222926fc5fa0800e033b2dbd22f
    Closes-Bug: RELENG-266
    Signed-off-by: Yolanda Robla <yroblamo@redhat.com>