Update git submodules

* Update docs/submodules/releng from branch 'master'
  - xci: Fix where the vm_defaults are placed

    Change-Id: I3d9d9b8b7c3de0c22a62945de027b9e8994d35e8
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 0150873..961c6ae 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 01508737693731742269326d6ae92a17bebea433
+Subproject commit 961c6ae6880752fcfc87bcce007b0e29b69c5fc1