Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 8c1ae160f8f495c4ce0679203972112735faeccf
  - Fix instance detail for CCVPN
    
    Change-Id: I8f1bbbfa80d48ec91d3929069771638c9f5dbb8a
    Issue-ID: USECASEUI-222
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>
    
1 file changed