Update git submodules

* Update docs/submodules/samplevnf from branch 'master'
  - Docs: Enhance the userguide with CLI command reference

    JIRA: SAMPLEVNF-84

    Update the documents with CLI command reference and Resolve the
    jenkins build warnings.

    Change-Id: I2bf22507758e1a13b648cc40d86495581fe0d981
    Signed-off-by: Anand B Jyoti <anand.b.jyoti@intel.com>

diff --git a/docs/submodules/samplevnf b/docs/submodules/samplevnf
index 01538d7..039ac41 160000 (submodule)
--- a/docs/submodules/samplevnf
+++ b/docs/submodules/samplevnf
@@ -1 +1 @@
-Subproject commit 01538d73cc815f943d9c4341cbe8356bb9d93440
+Subproject commit 039ac41531956a733ed96f7c715ed072e724e0df