Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Remove quagga fix in the testcase

    Solves partly:
    JIRA: SDNVPN-130

    Change-Id: I1cf99e9294925545f6fece660983e32f6543f2b8
    Signed-off-by: Nikolas Hermanns <nikolas.hermanns@ericsson.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index 7d9d4d1..5960fab 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit 7d9d4d18b64fef71d9d4a7de0c4f143e2154ec2c
+Subproject commit 5960fab7230bebbffc439457d5542d086cb3f8af