Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Merge "Update Release notes for Gambia release"
  - Update Release notes for Gambia release

    JIRA: SDNVPN-226

    Change-Id: I839e95f23f8c1faf9fe231dad39b50b2e380841d
    Signed-off-by: dimitris.tsiolakis <dmts@intracom-telecom.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index e97d0c5..10a00e4 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit e97d0c53a5b15e590e03ba86972eed26db4009c0
+Subproject commit 10a00e4e702d316463dec42ecbbdce9e6687ef32