Update git submodules

* Update docs/submodules/samplevnf from branch 'master'
  - Merge "vCGNAPT: correcting to use default rte_ring_dequeue"
  - vCGNAPT: correcting to use default rte_ring_dequeue

    JIRA: SAMPLEVNF-19

    The rte_ring_sc_dequeue returns ENOENT in DPDK16.04 while ENOBUFS in
    DPDK17.05. This leads to error in return value checking and mis behaviour.

    Using of rte_ring_sc_dequeue() to be avoided to use the default
    configuration as set during the creation of the queue as per the
    DPDK API documentation. Similarly corrected for mp_dequeue as well.

    Change-Id: Iacee1349b26d6ab432be891fad12313a6d68ca4d
    Signed-off-by: Anand B Jyoti <anand.b.jyoti@intel.com>

diff --git a/docs/submodules/samplevnf b/docs/submodules/samplevnf
index 04714a4..735b136 160000 (submodule)
--- a/docs/submodules/samplevnf
+++ b/docs/submodules/samplevnf
@@ -1 +1 @@
-Subproject commit 04714a4f30a061f39cda864dec2f350e0051a56a
+Subproject commit 735b1362bf72d8bfec56e4964f43b60170144213