Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[Dovetail] using correct rabbitmq process name"
  - [Dovetail] using correct rabbitmq process name

    Using the correct process name for the rabbitmq server in the HA test
    configuration.

    Change-Id: I42c8ba093f34c5d15f8c2e19b69538b22b716637
    Signed-off-by: Georg Kunz <georg.kunz@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 50151eb..5708615 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 50151eb3717edd4ddd996f3705fbe1732de7f3b7
+Subproject commit 57086159e02ce7518c4ec26c7dd5433f07ea3991