Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[Functest] Add presetup and fetch credentials for Alpine job"
  - [Functest] Add presetup and fetch credentials for Alpine job

    Change-Id: I8633353f3ca9bbf854e0d67760e6504524309d74
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4fc1f80..27c49c9 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4fc1f80d9f563f651a78cc4c45a2810afc8298d7
+Subproject commit 27c49c9bafc6a0a25759ae473d4c71cf87f58d90