Update git submodules

* Update docs/submodules/samplevnf from branch 'stable/euphrates'
  - vACL: The ethernet mac address not updated correctly

    JIRA: SAMPLEVNF-85

    The ethernet header pointer initialization was wrong due to which
    the MAC address were not updated. Hence the packets were not
    reaching the destination.

    Change-Id: Ide061abaec9de9707390664848b01bf79171bfbd
    Signed-off-by: Anand B Jyoti <anand.b.jyoti@intel.com>

diff --git a/docs/submodules/samplevnf b/docs/submodules/samplevnf
index 8f3b4da..3043bed 160000 (submodule)
--- a/docs/submodules/samplevnf
+++ b/docs/submodules/samplevnf
@@ -1 +1 @@
-Subproject commit 8f3b4da193b5f2050c06ca57eb09e32439901c5b
+Subproject commit 3043bed1b326f08a8360d69529ef38637e721931