Update git submodules

* Update docs/submodules/samplevnf from branch 'master'
  - Replaced heat stack yaml files by individual server creation

    There is now a new file (rapidVMs.vms) describing how many VMs need
    to be created. You can specify the same flavor values in the [DEFAULT]
    section or specify specific flavors per VM.
    The heat stack yaml files are removed.

    Change-Id: Ic5ec485e8344a35e9ac9f6e8347adbc70520d10a
    Signed-off-by: Luc Provoost <luc.provoost@intel.com>

diff --git a/docs/submodules/samplevnf b/docs/submodules/samplevnf
index 37d8126..2ba9216 160000 (submodule)
--- a/docs/submodules/samplevnf
+++ b/docs/submodules/samplevnf
@@ -1 +1 @@
-Subproject commit 37d81265d5e06c2ad87446511681259222c94984
+Subproject commit 2ba92161c4492779d0b858db468619737896dd9f