Update git submodules

* Update docs/submodules/nfvbench from branch 'master'
  - Update release notes

    Change-Id: Ib726a626f157159b69ab1b63c311ce1bd7032170
    Signed-off-by: ahothan <ahothan@cisco.com>

diff --git a/docs/submodules/nfvbench b/docs/submodules/nfvbench
index e1df419..34c0054 160000 (submodule)
--- a/docs/submodules/nfvbench
+++ b/docs/submodules/nfvbench
@@ -1 +1 @@
-Subproject commit e1df419918039eda72c0237729511c83b4cdb380
+Subproject commit 34c00544f7f7dbfa49bbdcd83eca2936b60826c7