Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "add Calipso Jenkins job: run unit tests"
  - add Calipso Jenkins job: run unit tests

    Change-Id: I6ecb7f85d9cdfc3dadc7e3b6769daf3b6cb144b5
    Signed-off-by: yayogev <yaronyogev@gmail.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 81f4d3a..6861b18 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 81f4d3a3672a546478bd9903da497373a1cfd29b
+Subproject commit 6861b18b35e0f2d7e2356e318b7e4422d16721cc