Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 8c3d56d72b36ea3be72b6a2862f37553d9cc3776
  - Merge "Added support for volume group request to"
  - Added support for volume group request to
    
    Added support for volume group request to indicate whether the volume
    group existed, etc.
    
    Issue-ID: SO-2770
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I614926ad33220734133afd84bd8d0fedc8f6e6d6
    
1 file changed