Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - ci/deploy.sh: Add PDF parsing dependencies

    The following packages are required for PDF parsing:
    - python
    - python-ipaddress
    - python-jinja2

    Note that `python-ipaddress` is not available on older Ubuntu
    distributions (e.g. Trusty), in which case `pip` should be used to
    install it. An alternative would be to use python3 packages.

    Update the installation instructions to specify minimum expected
    requirements on the jump server.

    JIRA: FUEL-292

    Change-Id: I19fdcc163dcfdee45ac6fa3f5e09a28638d6035c
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit f10bc960eead6c1423ada006a383515279056886)