Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 1196db4be81e49b8282908e76c6f0f72a29ccb9f
  - Merge "vrfvalidation exceptions not getting logged"
  - vrfvalidation exceptions not getting logged

    Remove unused imports in VrfValidation class
    Check for null AAI network and vpn-bindings. Do not catch exceptions in
    WorkflowAction.traverseVrfCondifuration. Propagate exceptions and let
    calling method selectExecutionList() handle exceptions.

    Change-Id: I26adfdb351cee6dc111f496901558340b8152a2a
    Issue-ID: SO-1988
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>