Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 22ff11be9378a90a22152ab5d0901bd1d4e83fed
  - Dashboard interface front-end development
    
    Change-Id: I987e663bed2fd6ff584fe00fd6a29b133724e629
    Issue-ID: USECASEUI-214
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>
    
1 file changed