Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to fa9a707c87654330dfb5788a6029b8199c6cdf17
  - move network adapter to an external client task

    Began impelenting new network external task.
    Made the vnfAdapterTask subflow an openstack subflow, refactored infra
    flows and BB to call it for network functions.
    Fixed bugs discovered through a robot dry run, added unit test, added
    support for rollback network request
    Updated junit test files for comparison due to not polling for response
    Removed the no longer used network adapter rest task from bpmn tasks
    Removed the unused network adapter async and its beans
    Removed network async client package from open pojo scan

    Issue-ID: SO-2813
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I4c25892012cc86659ab122448ed1aca5cab91671