Update git submodules

Update git submodules

* Update docs/submodules/compass4nfv from branch 'master'
  - Merge "Upgrade odl from carbon to nitrogen"
  - Upgrade odl from carbon to nitrogen

    JIRA: -

    1. Because of the bug in odl sfc carbon, this patch upgrade the odl
    to Nitrogen release.

    2. Use the latest stable/ocata of networking-sfc and networking-odl

    3. Fix the bug in the patch of multiple physnet mapping

    Change-Id: Id6e6084d9af76ff92d3c3ba6f8127154b2675aee
    Signed-off-by: Yifei Xue <xueyifei@huawei.com>