Update git submodules

Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - Merge "Fix host status grep bug and Remove connection_pool argument"
  - Fix host status grep bug and Remove connection_pool argument

    Host status returned the wrong output as the "OS-EXT-SRV-ATTR:host"
    pattern appears twice in the "openstack server show" output.
    The argument connection_pool is deprecated and is not needed.

    Change-Id: Ib107e0bad8084bdf6f77689f112bde04bdb97543
    Signed-off-by: Umar Farooq <umar.farooq@neclab.eu>