Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to f0dc8623294868179f1264a6ef80980dd990a313
  - added fix for missing Error from SDNC prefix

    added fix for missing Error from SDNC prefix to SDNC callback flow
    reverted implementation from bpmn-tasks package and moved them to apih
    side, added junit test
    renamed error message constant, removed regex check, add error message
    porefix directly to actual message

    Issue-ID: SO-2267
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I440cf9eff12571f576fcc5f2d28d9f2c8130e4b6