Update git submodules

* Update docs/submodules/samplevnf from branch 'stable/euphrates'
  - Fix all the config files alignment issues

    Change-Id: I087c9a9acf412a99f8425fd65d07db6c3b7a4af7
    Signed-off-by: Deepak S <deepak.s@linux.intel.com>

diff --git a/docs/submodules/samplevnf b/docs/submodules/samplevnf
index 6aab5b8..1482bf9 160000 (submodule)
--- a/docs/submodules/samplevnf
+++ b/docs/submodules/samplevnf
@@ -1 +1 @@
-Subproject commit 6aab5b8051cbc73962598ebd54c550f9bc3bd916
+Subproject commit 1482bf952151f8ff1089547520f0844ff6f60768