Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Merge "Return Functest status to Jenkins" into stable/euphrates
  - Return Functest status to Jenkins

    It avoids mixing Functest and Features CI issues by simply exiting the
    status of Functest testcases. The result of third-party testcases are
    printed into console but are no longer taken into account into the
    global status.

    Change-Id: I040ff54780db2ddb6d81993839fee09f5e472323
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 516d1bd7811f5751d796748ddd52f798bbd5a40f)