Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 8b22646793d3f6cd2e8e0f5a90deae87140e17b3
  - Merge "mso vnf configuration update composite flow"
  - mso vnf configuration update composite flow

    Existing Change Management VNF Configuration Update flow migrated to
    the generic building blocks
    Introduced Activity BB VNFConfigModifyActivity.bpmn
    Updates to AppcOrcherationPreProcessor, ApplicationControllerTaskImpl
    to handle the ConfigModify Activity block.
    Updates to the catalog migration scripts to include VNF-Config-Update
    Macro flow.

    Issue-ID: SO-2768
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I06be7a83fb2738b91b0257e1ec84298a7dafc1a1