Update git submodules

* Update docs/submodules/nfvbench from branch 'stable/euphrates'
  - Fix function name in test code

    Change-Id: Id315153744f6458c8af0abd5c7a180178f901d97
    Signed-off-by: ahothan <ahothan@cisco.com>

diff --git a/docs/submodules/nfvbench b/docs/submodules/nfvbench
index af564a3..08c848d 160000 (submodule)
--- a/docs/submodules/nfvbench
+++ b/docs/submodules/nfvbench
@@ -1 +1 @@
-Subproject commit af564a30bcf5574ac444b59bd0434207667dcb28
+Subproject commit 08c848d44a2a39828593b30c172a6e33773f4efc