Update git submodules

Update git submodules

* Update docs/submodules/ccsdk/cds.git from branch 'master'
  to d03ffa951ba370283255f62923d761923f8294bb
  - Merge "virtualenv lib changed. need to pin to older version."
  - virtualenv lib changed. need to pin to older version.

    Issue-ID: CCSDK-2108

    virtualenv no longer has "writefile" function, also activate_this.py has changed.
    we don't have time to investigate the impact right now, so doing this work-around.

    Signed-off-by: Oleg Mitsura <oleg.mitsura@amdocs.com>
    Change-Id: I9503050163ba420cf0e39ded4d992a34bf5d0ae3