Update git submodules

* Update docs/submodules/sdnvpn from branch 'stable/fraser'
  - Fix the logging to be compatible with functest

    Change-Id: I62b432497175e79bcf2cd241be54d8a7f5db2799
    Signed-off-by: Periyasamy Palanisamy <periyasamy.palanisamy@ericsson.com>
    (cherry picked from commit e08e7c43c85fa04dc78a1fcf8a11ab877a78dfb9)

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index 352c595..24106af 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit 352c59535785950f9af57838ceaced3b040ca238
+Subproject commit 24106af0bc806b68c2f7b2901638127d9249b8d0