Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Merge "Fix fail of pinging a floating IP- testcase8"
  - Fix fail of pinging a floating IP- testcase8

    -Raise the upper bound for ping action

    JIRA: SDNVPN-154

    Change-Id: Ifadf58f551f706a90cc17b0b1f8d05718e4908f9
    Signed-off-by: tomsou <soth@intracom-telecom.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index 5d93773..9fb7fad 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit 5d93773cd66119ac49d9feb171b5fc9108e53fca
+Subproject commit 9fb7fad2a9f83ddb7d0c1f61b2d5609352fb6f15