Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 97c18e70d0d79dedc07118a2ceef20fc41d7ac48
  - Service instance lifecycle management
    
    Change-Id: Ibdf6cc1da4a4cbb129e64132ba7abfdbb189e05c
    Issue-ID: USECASEUI-218
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>
    
1 file changed