Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to b04c4a38e808215a975d27536ce9a243981bd5e5
  - Support OTN Domain Management
    
    Change-Id: I9bde56e50b90bac2d8d8ce1c0743156d1938d974
    Issue-ID: USECASEUI-226
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>
    
1 file changed