Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Bugfixing the testcases execusion

    tempest.api.compute.servers.test_server_actions\
    .ServerActionsTestJSON.test_reboot_server_hard
    is working in fuel so do test it.

    The "-" was missing on
    tempest.scenario.test_server_basic_ops
    .TestServerBasicOps.test_server_basic_ops

    Change-Id: I6808ce9283271e2d2f8acf7c2587aed006d1cbc2
    Signed-off-by: Nikolas Hermanns <nikolas.hermanns@ericsson.com>
    (cherry picked from commit f85b54b8fc8843897f9c1a7b4711b489ab29f297)