Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 824b38dceab0fe94c3d80be31e48580609620641
  - Merge changes I16ee57af,Ie1b7ebdd

    * changes:
      Add heatbridge authenticate method
      SO and heatbridge integration for delete flow

  - Add heatbridge authenticate method

    Signed-off-by: Munir Ahmad <munir.ahmad@bell.ca>
    Change-Id: I16ee57af3c67d1443f07ea44536a13b6cac786dc
    Issue-ID: SO-2549

  - SO and heatbridge integration for delete flow

    Issue-ID: SO-2272

    Signed-off-by: Munir Ahmad <munir.ahmad@bell.ca>
    Change-Id: Ie1b7ebdd1758478655779d940eabe0836834fcc4