Update git submodules

Update git submodules

* Update docs/submodules/releng/builder from branch 'master'
  to 095880b5d82b82c0ed8725ff9aedc3a6d12b6652
  - Merge "Pin networking-l2gw client to specific version"
  - Pin networking-l2gw client to specific version

    The Robot VM was installing latest, which actually
    points to version:

        networking-l2gw-2016.1.0

    But, the version we need is:
        networking-l2gw-11.0.0

    In Pike and Queens CSIT, this resulted in neutron
    l2gw commands not being available. This will
    resolve that issue, still working other issues
    for pike/queens.

    Change-Id: I6214b799cfafcf3635579a5918d631dd56955a61
    Signed-off-by: Victor Pickard <vpickard@redhat.com>