Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "add jenkins for stor4nfv"
  - add jenkins for stor4nfv

    Change-Id: I2abd2d200840a16139befe1bb734b94e175123d9
    Signed-off-by: Guo Ruijing <ruijing.guo@intel.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8a7644a..63fbd31 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8a7644a52f5205f938a1348f16ed3b4a0726074b
+Subproject commit 63fbd31ac218846da13f84ee17ef7a61e159055f