Update git submodules

* Update docs/submodules/samplevnf from branch 'master'
  - Splitting the script in 2 parts: createrapid.py and runrapid.py

    The split of the scripts is documented in the README file. The VM also
    runs now devbind.sh with the proper MAC address to bind the dataplane
    interface with the DPDK poll mode driver.

    Change-Id: I3e7a6235379dc80530934376c7799ac3396b5325
    Luc Provoost <luc.provoost@intel.com>
    Signed-off-by: Deepak S <deepak.s@linux.intel.com>

diff --git a/docs/submodules/samplevnf b/docs/submodules/samplevnf
index 71a854f..be23f20 160000 (submodule)
--- a/docs/submodules/samplevnf
+++ b/docs/submodules/samplevnf
@@ -1 +1 @@
-Subproject commit 71a854fb279a807e9cde9a7afa3a75d843bd69ed
+Subproject commit be23f20bcddd63dec506515c1518c995b0f8aa86