Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/danube'
  - Revert "Make SFC test a python call to main()"

    This reverts commit d5820bef80ea4bdb871380dbfe41db12290fc5f8.

    Robot test runs before SFC test and it imports
    https://github.com/robotframework/SSHLibrary
    which does a monkey patching in
    the python runtime / paramiko.
    Untill now sfc run in a new python process (clean)
    because it run using the bash command.
    But when importing it as a module and call main()
    from python, it will run in the patched runtime
    and it will error out.
    https://hastebin.com/iyobuxutib.py

    Change-Id: I54237c32c957718b363d302efe84e01bc78e4f47
    Signed-off-by: George Paraskevopoulos <geopar@intracom-telecom.com>
    (cherry picked from commit e59055e29b5cc6a027d3a24803cc05fd709cca90)