Update git submodules

Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Improve ansible tasks and fix license headers

    This patch does two things:
    1. improve the ansible tasks:
       - register Openstack as VIM
       - create osmrc file
       - install OSM (master)
    2. fix license headers in unit tests

    installer-type:osa
    deploy-scenario:os-odl-sfc_osm

    Change-Id: I02297dae2b0108397541cedeb2f47183f1df99fc
    Signed-off-by: Venkata Harshavardhan Reddy Allu <venkataharshavardhan_ven@srmuniv.edu.in>