Update git submodules

Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Merge "[Bug Fix] Delete vnffgs in a reverse order"
  - [Bug Fix] Delete vnffgs in a reverse order

    JIRA: SFC-106

    In sfc_two_chain testcase we need to delete first the blue
    and then the red vnffg because if we do it the other way around
    the tacker produces a warning that the flow classifier of the vnffg red
    is in use and cannot delete the chain.

    The aforementioned warning is produced because during the execution
    of the two_chain testcase we reassing the classifier from the red vnffg
    to the blue vnffg. So if we try to delete first the red vnffg we get the
    warning because the classifier is assigned and in use from the blue
    vnffg.

    Change-Id: I3cb7bef4b9b9e75eef4961fe7f63cbc1755130be
    Signed-off-by: Dimitrios Markou <mardim@intracom-telecom.com>