Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to b473586220ef2f1b3905a4028639fde8709cfbe5
  - fix:fix bugs of slicing business page
    
    Change-Id: I41cdecff5e85df536b94078cd999118772fe92da
    Issue-ID: USECASEUI-369
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed