Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 816cb9070dab89b4a0f513aacc6cab3c0f4db51a
  - UT for adapter
    
    Adding UT
    
    Change-Id: I54d06c8cddd8fc5eae1ac49684e5f7c3c57e39a2
    Issue-ID: SO-2544
    Signed-off-by: jananib <janani.b@huawei.com>
    
1 file changed