Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to c46bae2a8435ae6e27e242c0a158f4c99214461f
  - fix: fix bugs of adding customers
    
    Change-Id: I177fc3a15aa49beefc3ea5c372a2e60dc594c90d
    Issue-ID: USECASEUI-306
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed