Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Merge "Remove the former results in DB url" into stable/danube
  - Remove the former results in DB url

    It conforms generate_report.py with the previous change [1].

    [1] https://gerrit.opnfv.org/gerrit/#/c/33511/

    Conflicts:
        functest/tests/unit/ci/test_generate_report.py

    Change-Id: I677ebd416f462a591439fc7b637c02d7964e6173
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit a212763c3e9f4cf6d52200aa614e42a911c5dbf7)