Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - List neutron exts and service providers in connection_check

    It eases debugging as well [1].

    [1] https://artifacts.opnfv.org/logs/functest/lf-pod1/2018-10-20_12-23-41/patrole/tempest-report.html

    Change-Id: Ie9ddc280fc239c5e0887347d434839940e7a3240
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
  - Switch SCAP url

    The former link is unreachable 502 [1].

    [1] https://build.opnfv.org/ci/job/functest-verify-unit-tests-and-docs-gambia/96/console

    Change-Id: Ibc865a4d367fdc48505e9b4ebe674f63cba8b8e1
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>