Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 505d607bad24c1a64e3a094db81c0a888fb53c4b
  - Merge "Add sub-process script for deleting slice service"
  - Add sub-process script for deleting slice service
    
    Issue-ID: SO-2368
    
    Signed-off-by: zm330 <zhangminyj@chinamobile.com>
    Change-Id: Ia539d48c9532fcd4ff6b32d35672e15fc9e2671b
    
1 file changed