Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Reuse the right detected role name

    It completes "Try to get Member or member role" [1][2].

    [1] https://gerrit.opnfv.org/gerrit/#/c/59661/
    [2] https://build.opnfv.org/ci/view/functest/job/functest-apex-baremetal-daily-master/144/console

    Change-Id: Ib38b513906b08d6f85834e03f5415e83b66b733b
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 1222e8c0f3699c5d74c54df11e5cdf00fd468b59)