Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Cleanup br-ex/br-quagga from testcase_3

    After the peering between Quagga and ODL within testcase 3
    cleanup br-ex (for fuel) or br-quagga (for apex) interfaces

    JIRA: SDNVPN-13

    Change-Id: I3e7bf91d4e47dfd7fe2a5068ed40ea4b2be48c6d
    Signed-off-by: tomsou <soth@intracom-telecom.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index 5bcc4c1..0d8f3bf 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit 5bcc4c1a6ec2e592d3a0dac4b309b46e48f651a8
+Subproject commit 0d8f3bf930bdd945d34188fb591a6deb03a999c5