Update git submodules

Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "barometer: Add job definition for collectd-master docker image build"
  - barometer: Add job definition for collectd-master docker image build

    Added definition for build & push docker image for
    'barometer-collectd-master' - it is a barometer-collectd
    container that is based on latest master branch from collectd.

    Change-Id: I4d4b7c27971cbeffb8f303ef6b7799cc927d65f0
    Signed-off-by: Radoslaw Jablonski <radoslawx.jablonski@intel.com>