Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 76536f355c758caf2d9656f05a10918a3914b6aa
  - Merge "Service instance lifecycle management"
  - Service instance lifecycle management
    
    Change-Id: I68bbc10d0df26e43bc3b78c8db5cf208359bfa82
    Issue-ID: USECASEUI-218
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>
    
1 file changed