Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/fraser'
  - Merge "Get debug data before cleaning juju_epc" into stable/fraser
  - Get debug data before cleaning juju_epc

    It could help us to detect the issue when testing Apex (nosdn).
    It should be only printed on exceptions instead but this proposal is
    safer and straightforward.

    Change-Id: I2cccc737e3b3572af72c2653bf32bc02f9ab9077
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit c789cca4a6e9afefba0c1622d49a181dd35437f7)