Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Correct the gerrit project name for sdnvpn"
  - xci: Correct the gerrit project name for sdnvpn

    Change-Id: Ied1014546f6bd4d80896f29f86374a2865f95dca
    Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 542711c..6486bfb 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 542711c094e9aed521e6462982c792c1e5d2392f
+Subproject commit 6486bfbd8c74ac8aab3a586d8aa9a2e259690851