Update git submodules

* Update docs/submodules/samplevnf from branch 'master'
  - Merge "Rest API: Fix all the bugs in the HWLB, mask issue, etc"
  - Rest API: Fix all the bugs in the HWLB, mask issue, etc

    Change-Id: If7cc44f3b57a54aef510f729930e6f79bf83689e
    Signed-off-by: Deepak S <deepak.s@linux.intel.com>

diff --git a/docs/submodules/samplevnf b/docs/submodules/samplevnf
index e053f47..cebfb1f 160000 (submodule)
--- a/docs/submodules/samplevnf
+++ b/docs/submodules/samplevnf
@@ -1 +1 @@
-Subproject commit e053f47d7137aa0cc0d60f76be8779b04d6b833b
+Subproject commit cebfb1f01540ca791aa2edc84a0e7ebba567ce28