Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Merge "Support https when testing ODL" into stable/euphrates
  - Support https when testing ODL

    It conforms with the last change on ODL tests [1].
    Neutron endpoint is passed via robot args instead of Neutron ip.
    Keystone url (based on OS_AUTH_URL) is passed too to replace Keystone
    ip.

    [1] https://git.opendaylight.org/gerrit/#/c/63293/

    Conflicts:
        docker/restapi/Dockerfile
        docker/smoke/Dockerfile

    Change-Id: Ie44f55304a438b1b0289ec69ac2241664be70e80
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit dd99f5356ef08f3a2a1ed18d63492391390df752)