Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "opnfv-docker: add barometer"
  - opnfv-docker: add barometer

    Change-Id: I0f768c1350cd1f5d6613b93b34319e7a1c321a29
    Signed-off-by: Maryam Tahhan <maryam.tahhan@intel.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3732c0a..3daad1e 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 3732c0ac30c2b67b30680aee2d0ba8982a9b528c
+Subproject commit 3daad1ec08f420006dbc805a42c1c3310de7c89c