Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - Simplify logging

    In order to collect logs from features running through
    functest framework (mainly for troubleshooting purposes),
    the logging mechanism has been updated accordingly.

    It should be noted that feature logs are printed in functest.log.
    All logs are now printed in functest.log whatever the namespace.

    JIRA: SFC-125

    Co-Authored-By: Cédric Ollivier <cedric.ollivier@orange.com>
    Change-Id: I6cb32e5553749023d490d553ae4653750c52e844
    Signed-off-by: Panagiotis Karalis <pkaralis@intracom-telecom.com>
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>