Update git submodules

* Update docs/submodules/sdnvpn from branch 'master'
  - Merge "Prepare run_tests to be called directly to main()"
  - Prepare run_tests to be called directly to main()

    Instead of python -> bash -> python, call
    the BGPVPN test using main()

    Change-Id: I8cca741814937e0a7a1d8b848fa8658e4f0d6fb5
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>

diff --git a/docs/submodules/sdnvpn b/docs/submodules/sdnvpn
index a8ac068..792ecc2 160000 (submodule)
--- a/docs/submodules/sdnvpn
+++ b/docs/submodules/sdnvpn
@@ -1 +1 @@
-Subproject commit a8ac0683dc4accfc4d300de20071989c0d1ffb63
+Subproject commit 792ecc29222604124a3da02b64aca7bae81207d2