Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Change barometer module to load"
  - Change barometer module to load

    As [1] is merged, the way to call the barometer test case is
    different as it is hosted in Barometer repo instead of Functest.
    The former files are also simply removed too.

    baro-tests is no longer a requirement. It is installed as any
    third party project.

    [1] https://gerrit.opnfv.org/gerrit/#/c/35927/

    Co-Authored-By: Cédric Ollivier <cedric.ollivier@orange.com>
    Change-Id: Iea56b48fa781600eb3a6ac74662ea8a29f556f99
    Signed-off-by: Jose Lausuch <jose.lausuch@ericsson.com>
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>