Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "snaps: Configure job to execute run_tests.sh against existing deployment"
  - snaps: Configure job to execute run_tests.sh against existing deployment

    Change-Id: I14de06073f8ed1fd6ef29020f64816f31c6ff074
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 4e074b2..b2d5f0e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 4e074b25899eac05b8e1509ada182f5695658ce8
+Subproject commit b2d5f0ee60de6c685f51e6a54c3cff44fe14d4c1