Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to ac1fe27ad4d7301f886d1755ea9eb8d1cb10be74
  - Merge "Fix Heatbridge auth for Keystone-v3"
  - Fix Heatbridge auth for Keystone-v3
    
    Fix Heatbridge auth for Keystone-v3
    
    Issue-ID: SO-2980
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: Idacce2beebde14f43817ada59fb0d593504c6bdd
    
1 file changed