Update git submodules

Update git submodules

* Update docs/submodules/sfc from branch 'master'
  to f3ed46b2782020237b55928bb374e828265bb041
  - Refine affected RSP search on SFF update

    Previously, any SFF locator update would cause the removal of any RSP
    associated with that SFF. With this patch, in regards to a SFF locator
    update, an associated RSP will be removed only if any of these
    conditions are met:

    * The SFF locator is used in a SF dictionary entry for an SF associated
    with the RSP.

    * The RSP is associated with more SFFs than the updated SFF so that the
    updated locator could be used in a SFF-SFF hop.

    This improvement is particularly meaningful for the logical SFF scenario
    in combination with the changes introduced for the directional-dpl spec.
    The logical SFF singleton is no longer an empty SFF and will be updated
    frequently as paths are created or removed. It is fundamental that other
    paths are not affected when they shouldn't.

    The current data model does not allow for optimum processing and there
    might be performance impacts on big SFFs, as the logical SFF most likely
    will be. For a future release, there is the option to enhance the data
    model to optimize this.

    Change-Id: I16660e241779ff24bf644e4377e12965b12f695b
    Signed-off-by: Jaime Caamaño Ruiz <jcaamano@suse.com>