Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Merge "docker: add Dockerfile for barometer-snmp"
  - docker: add Dockerfile for barometer-snmp

    Change-Id: I0e53dc5c9889c3f503ab4459aae8143243959c17
    Signed-off-by: Gordon Kelly <gordon.kelly@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 2d105ab..db356eb 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 2d105ab75061d4d276b200d31b78ea649d5f2838
+Subproject commit db356eba1071fe9ca5bc92586eeebe9bd3005f13