Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Merge "Add own logger for SdnvpnFuncTest class"
  - Add own logger for SdnvpnFuncTest class

    The functest xtesting Testcase class removed the logger instance
    variable, so let SdnvpnFuncTest use its own logger.

    JIRA: SDNVPN-215

    Change-Id: I8b611273e44204d5051fad1140e6ecaddc2a4334
    Signed-off-by: Periyasamy Palanisamy <periyasamy.palanisamy@ericsson.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index 96d17e0..9d501e5 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit 96d17e018f0b4b4547689a31fb0e4f4af1d65a07
+Subproject commit 9d501e5cbc1c384f405c8238fd86785561b9e39e