Update git submodules

Update git submodules

* Update docs/submodules/barometer from branch 'master'
  - Merge "Fix syntax error in baro_test/collectd.py:mcelog_install"
  - Fix syntax error in baro_test/collectd.py:mcelog_install

    The version of CentOS that's used no longer matches the version that
    is explicitly checked in collectd.py:mcelog_install.

    As a result the code on L637-L642[1] is now being called.
    This code was syntactically incorrect, however, was previously not being
    called, witht eh update to the version, it is now being executed and
    causing failures in deployment [2].

    [1] https://github.com/opnfv/barometer/blob/c10400426df872be3236677dcb749c755f4a559c/baro_tests/collectd.py#L637-L642
    [2] https://build.opnfv.org/ci/job/functest-apex-baremetal-daily-master/809/consoleText

    Change-Id: I35274d4ede17510c3ae03c756eda7bc9f78b4e17
    Signed-off-by: Emma Foley <emma.l.foley@intel.com>