Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Switch to Python3 divide in cloudify_ims

    The code simply asks for python3 divide else only live_test = 100% is
    considered as successful [1].

    [1] https://build.opnfv.org/ci/view/functest/job/functest-apex-baremetal-daily-fraser/169/console

    Change-Id: I84690d20791cd3d6a68823eec40f0e4b0f876b72
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit f7b6a9a8d69313bbb8203eaf25b2d78d86ae799c)

  - Switch from OS_ENDPOINT_TYPE to OS_INTERFACE

    It also set endpoint_type to public in tempest.conf if unset.

    JIRA: FUNCTEST-975

    Change-Id: I91bd1d7171b4bcf58dbe818696d5b864d5036619
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 4f9789cfab845d7209f5a2fc2209cad8941d02d6)