Update git submodules

Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - Merge "Test port data plane status on Sample Inspector"
  - Test port data plane status on Sample Inspector

    Exercise the Neutron port data plane status API on the Sample Inspector.

    Setting the data_plane_status field of Neutron Port objects to 'DOWN'
    when a network failure on a node is detected.

    To keep the test simple enough to verify the Neutron API, we don't
    consider a scenario where multiple NIC ports could be present on that
    particular node. It could still be done, though.

    JIRA: DOCTOR-107

    Change-Id: I9ffa0a23626b7edfaeb601dc90d55c756216cc41
    Signed-off-by: Carlos Goncalves <carlos.goncalves@neclab.eu>