Update git submodules

Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - docker: updated grafana image to continue to send API request to grafana

    Updated grafana image to continue to send API request to grafana server
    at 1 sec intervals at start time until grafana server is up and listening
    on port. Dashboards folder has been moved to /opt/grafana/dashboards.
    Documentation updated accordingly for all changes

    Change-Id: I748b05372f0aa0890d3befa5645834fb217db784
    Signed-off-by: gordonkelly <gordon.kelly@intel.com>