Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Enable functest-kubernetes docker builds"
  - Enable functest-kubernetes docker builds

    Change-Id: I6326d0c25d673c407a3eda6451d242d2571fdaee
    Signed-off-by: Jose Lausuch <jalausuch@suse.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 071c4bc..e47b91a 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 071c4bc5708601763941d61c502f800e3460be6b
+Subproject commit e47b91acf5b085fcc87a8b962a36292726e3e516