Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge "Restrict coverage output to all functest packages"
  - Restrict coverage output to all functest packages

    The next packages/modules are not yet covered:
      - functest/cli/setup.py
      - functest/core/pytest_suite_runner.py
      - functest/opnfv_tests/mano
      - functest/opnfv_tests/openstack/examples
      - functest/opnfv_tests/openstack/snaps
      - functest/opnfv_tests/openstack/vping
      - functest/opnfv_tests/sdn/onos
      - functest/opnfv_tests/vnf/aaa
      - functest/opnfv_tests/vnf/ims
      - functest/opnfv_tests/vnf/router
      - functest/utils/openstack

    Change-Id: Id62749796864537615f0ca8b162ce77b6c1a3309
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>