Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Merge changes Ib7384772,I94e94c21

    * changes:
      Update to Alpine 3.8
      Publish unit test report

  - Update to Alpine 3.8

    https://alpinelinux.org/posts/Alpine-3.8.0-released.html

    Change-Id: Ib7384772175dd83f735d8cfbfafa1cef3fdc382c
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
  - Publish unit test report

    It leverages on nosehtmloutput [1]

    [1] https://github.com/openstack-infra/nose-html-output

    Change-Id: I94e94c2127b4ff8e032e121dd2bd56b3c22809f8
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>