Update git submodules

Update git submodules

* Update docs/submodules/ccsdk/features.git from branch 'master'
  to ce964fd1a1bc139bad6548ba79a0ac84190af598
  - Merge "Migrate ccsdk-features docs"
  - Migrate ccsdk-features docs

    Merging this will create
    https://onap-ccsdk-features.readthedocs.io
    This build will run in parallel
    to the current docs generation method
    until we are ready to cut over.

    Issue-ID: CIMAN-364
    Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
    Change-Id: Id4195c72229e798a771729ab09a93a8c76becbda