Update git submodules

Update git submodules

* Update docs/submodules/functest from branch 'master'
  - SNAPS via functest with flavor metadata configurable

    The required data for the SNAPS flavors are sent through
    the config_functest yaml file in order for the SNAPS scenarios to be
    configured accordingly.
    If the config_functest yaml file includes empty flavor_extra_specs
    or there is not included this parameter, the SNAPS scenarios will be
    executed using the hardcoded value.

    Change-Id: I4ef46d1fe93497d658414170a72c4520d8f37808
    Signed-off-by: Panagiotis Karalis <pkaralis@intracom-telecom.com>
  - Revert "Stop rolling snaps (bypass bugfixes)"

    This reverts commit 8c285c3fb56ce144ff7eb095b6fa401e29a03fc4.

    Change-Id: I2acc1cdc7fe2d12c6eb3d100f76c2dc3e502522f
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>