Update git submodules

Update git submodules

* Update docs/submodules/integration/test from branch 'master'
  to d94dfc4bb9578cb8b5bb9c97f34958544d52a1ba
  - Use same tests before and after downing two nodes

    Sometimes we notice a failure in connectivity after the step
    to take down two of three nodes, and the node that is left
    is in a bad state (maybe because it's the only node up and
    cannot sync with anyone). If there is a real connectivity
    issue we want to see it while a healthy cluster is running

    Change-Id: Ib0251318c3b58bfdce9e8327c8a2194a4ae3dd7b
    Signed-off-by: Jamo Luhrsen <jluhrsen@redhat.com>