Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Stop cloning doctor and domino"
  - Stop cloning doctor and domino

    Both testcases are disabled and the next reviews allow installing
    them via packages:
      - Add doctor-test package [1]
      - Add domino package [2]

    [1] https://gerrit.opnfv.org/gerrit/#/c/38177/
    [2] https://gerrit.opnfv.org/gerrit/#/c/40911/

    Change-Id: I03fc89c26f527e33417c17a8b1ab47d1c69c9a89
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>