Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[Dovetail] Changing the path of the ssh key in pod.yaml for yardstick"
  - [Dovetail] Changing the path of the ssh key in pod.yaml for yardstick

    The ssh key is already available in the userconfig directory mounted by
    Dovetail inside the Yardstick container.

    Change-Id: Ic72473e9e47b625fbf4a0f8a8fb140aaed72b69a
    Signed-off-by: Georg Kunz <georg.kunz@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1028e3a..47e9127 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1028e3a9ac72fd755d86670b05178c7aefcce315
+Subproject commit 47e912753dfbd977499ab8ce8f072a1d293a5410