Update git submodules

Update git submodules

* Update docs/submodules/ccsdk/cds.git from branch 'master'
  to 49df3104ad130b17d5c8ba1df0d436386662c922
  - Merge "allow null type for primitives"
  - allow null type for primitives

    (to be consistent with validPrimitiveTypes()
    in BluePrintTypes)
    TODO: refactor that as well.
    This should fix the issue with missing values
    in output-type-mapping breaking execution.

    Issue-Id: CCSDK-1614

    Signed-off-by: Oleg Mitsura <oleg.mitsura@amdocs.com>
    Change-Id: Ia209a3bfcdc5fc2ef1179bd46669be2d57426749