Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Add timeouts in juju_epc

    juju_epc still hangs if OpenStack isn't well deployed [1].
    As releng doesn't publish logs if the job is aborted, timeout has to
    be added mostly everywhere.

    [1] https://build.opnfv.org/ci/view/functest/job/functest-apex-baremetal-daily-fraser/31/console

    Change-Id: I0296cd811bda0234aab98f184b3ab247a5b32017
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 6279d9372d0a1827bb14e365cd02e9888941315d)