Update git submodules

* Update docs/submodules/kvmfornfv from branch 'stable/euphrates'
  - Adding new packet forwarding test cases

    This patch is used to add new packet forwarding test cases as part
    of kvmfornfv daily job. Also used to publish the throughput results
    of packet forwarding test cases on to yardstick grafana dashboard.

    Change-Id: Ic0c2ee4af69b8eae3a9edb05d3f22b06540b02e3
    Signed-off-by: Gundarapu Kalyan Reddy <reddyx.gundarapu@intel.com>
    (cherry picked from commit 3e03ee6596321cb9752868eecdd8d82a508b16d6)

diff --git a/docs/submodules/kvmfornfv b/docs/submodules/kvmfornfv
index d651cc7..03a51bb 160000 (submodule)
--- a/docs/submodules/kvmfornfv
+++ b/docs/submodules/kvmfornfv
@@ -1 +1 @@
-Subproject commit d651cc71797f8f32b0fe40ca4ee1c21d50558fd1
+Subproject commit 03a51bbeafdfa4b808ae4f20ff79e6636e25a51e