Update git submodules

* Update docs/submodules/samplevnf from branch 'master'
  - Fix cgnapt status output

    Change-Id: I37ef70ae324e258da16b7bd67baf0e939d88b3ec
    Signed-off-by: Deepak S <deepak.s@linux.intel.com>

diff --git a/docs/submodules/samplevnf b/docs/submodules/samplevnf
index ef8aae7..b9b9fb1 160000 (submodule)
--- a/docs/submodules/samplevnf
+++ b/docs/submodules/samplevnf
@@ -1 +1 @@
-Subproject commit ef8aae7214e0dd14d823b26b54dc7ce8eb4e319f
+Subproject commit b9b9fb1b319f24b6240ca2cc0871ad1ea12988c5