Update git submodules

Update git submodules

* Update docs/submodules/releng/builder from branch 'master'
  to 94dbade4c5d33fda5ce90eaceb527fc3c4b197e6
  - Merge changes from topic 'RELENG-704'

    * changes:
      Use protected to prevent cleanup script rming img
      Update cleanup scripts to work in Vex
      Update Orchestration scripts to work with Vex
      Update mininet and docker builders
      Update java-builder build-nodes for new cloud
      Update packer config to work in Vexxhost

  - Use protected to prevent cleanup script rming img

    With a pure OpenStack cloud we can use the "protected" setting to
    mark an image and prevent the cleanup script from removing in use
    images.

    Needs a new lftools release with the following patch
    https://gerrit.linuxfoundation.org/infra/7887

    Issue: RELENG-705
    Change-Id: I1096c2e7724494f9e24db5f31ee396eaea024fdc
    Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>
  - Update cleanup scripts to work in Vex

    This patch depends on a new lftools release with
    https://gerrit.linuxfoundation.org/infra/7887

    This is needed so that we can filter images with the
    ci_managed=yes metadata field and also hide protected images from the
    search query as we only want to delete images that are managed by
    changes which are not protected.

    Issue: RELENG-705
    Change-Id: Id8724035ed470f20418d6bbf181802592ffe18d0
    Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>
  - Update Orchestration scripts to work with Vex

    The Heat scripts as well as cleanup scripts all need to be recoded to
    work with Vexxhost.

    Issue: RELENG-705
    Issue: RELENG-707
    Change-Id: I5557e8fc7e760fb49da99eb62074b15039554bd5
    Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>
  - Update mininet and docker builders

    The new cloud provider has different flavours than what we were using
    so need to update the flavours to work in the new cloud.

    Issue: RELENG-707
    Change-Id: I42617eba8c780fbf7152874937b9305b3e04b4b0
    Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>
  - Update java-builder build-nodes for new cloud

    The new cloud provider has different flavours than what we were using
    so need to update the flavours to work in the new cloud.

    Issue: RELENG-707
    Change-Id: I86ba856d71c429c4310054614cd22e516bbd90c3
    Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>
  - Update packer config to work in Vexxhost

    Improved the templates to support SOCKS 5 proxy configuration
    via the `ssh_proxy_host` configuration that is optional. This
    can be configured in the vars file.

    Additionally we are now prefixing image names with "ZZCI - " so that
    you can immediately tell from the name that the image is managed by
    our automated systems as well as having them sorted last. This should
    make it easier to manage images in the WebUI.

    Update packer version from 0.12.2 to 1.1.3 so that we can use the
    ssh_proxy_host parameter.

    Issue: RELENG-706
    Change-Id: I3b7200c6a917a961f9da38e5eeea95347ceed4a7
    Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>