Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[Functest] Redirect output when downloading images"
  - [Functest] Redirect output when downloading images

    Change-Id: Ieb3df7a4fa1519cf13c4f597c62d17ce356168fb
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d9826c6..ffeb626 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d9826c6b7e14bb08911de66a6c5e20f5cc95ea8b
+Subproject commit ffeb62628840383530c66d43640ed161415f6416