Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Revert "armband-deploy.sh: Inherit env vars for sudo"

    Using sudo triggers a chain of dependencies in our infrastructure,
    ranging from issues cleaning up the Jenkins workspace to deploy-time
    permission issues.

    As it turns out, cleaning all looses ends after that change is not a
    trivial task, and the remaining work outweights the benefits of using
    sudo in the first place.

    The original motivation for using sudo was a superposition of:
    - hardcoded check for running as root in Fuel's ci/deploy.sh;
    - the ability to install packages on the hosts via apt-get/yum;
    - the ability to spawn VMs using virt-manager;

    All of the above can be mitigated by imposing a series of restrictions
    for the Jenkins slave / jump server workstation and the jenkins user:
    - check for sudo rights instead of running as root user;
    - explicitly use sudo for package installation and/or system-level
      changes;
    - add jenkins user to "kvm" and "libvirtd" groups;

    So, revert using sudo when calling the deploy script, and limit sudo
    actions to package installation in Armband's deploy script.
    To compensate running as a regular user, a series of small changes is
    required in Armband project itself, together with the appropiate
    Jenkins slave user configuration on the machines running this script.

    This reverts commit 67d8bac7b2a97531ad465f275747b3dc455d4fe4.

    Change-Id: I88df6db1a43b93b7314ceca53d353f9000f15153
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>