Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to a66d9c2da47ab5ca66f275fa66c8cec4fc0f7215
  - Merge "implement automatic migration for process"
  - implement automatic migration for process

    Initial setup of AutoProcessInstanceMigrationService
    Setup migration plan for auto migration
    Started adding unit tests for auto migration
    Setup processDefinitions as configurable list
    Moved autoMigrationEnabled and added default for keys

    Issue-ID: SO-2968
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: Ic3e4aed611e2a90a2083ffd5cd4f1a0e1b43d145