Update git submodules

Update git submodules

* Update docs/submodules/samplevnf from branch 'stable/euphrates'
  - arp: Config parameters longer than PIPELINE_MAX_ARGS chars ignored

    JIRA: SAMPLEVNF-86

    Due to this KW fix the arp pipeline is rejecting the commands
    greater than PIPELINE_MAX_ARGS size. This is seen in arp_route_tbl
    which can is becoming bigger in case of multi port setup.

    This patch undo the KW fix which is causing issue with longer
    parameters under ARPICMP pipeline.

    Change-Id: I7bd7124118f531aa70d0fddd75a8ae693455d361
    Signed-off-by: Anand B Jyoti <anand.b.jyoti@intel.com>