Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 8170823270d477f5edf9ce6363781c042f8e9b08
  - Service instance lifecycle management
    
    Change-Id: I6d03a8261b13afec4ce06612b2c42fcf97c9617c
    Issue-ID: USECASEUI-218
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>
    
1 file changed