Update git submodules

Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Merge "Create new scenario: os-odl-sfc_osm"
  - Create new scenario: os-odl-sfc_osm

    This change creates os-odl-sfc_osm scenario.
    - copy the base scenario, os-odl-sfc
    - remove tacker and pike config
    - add tasks, vars, defaults and templates from os-nosdn-osm role

    https://gerrit.opnfv.org/gerrit/#/c/63507/

    Verification of this patch has be done using a change in releng-xci
    pointing to this commit/corresponding patch on Gerrit to verify it
    works in order to help with the review.

    Change-Id: I90148063c6ff9881ef188e97956adea0e7cb5a7d
    Signed-off-by: Venkata Harshavardhan Reddy Allu <venkataharshavardhan_ven@srmuniv.edu.in>