Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 7bc38e15225f03990b119779de213657baba2166
  - Merge "CCVPN instance creation function"
  - CCVPN instance creation function
    
    Change-Id: I6919d8049a72959f3eb3861e220a9e43d46c7aa9
    Issue-ID: USECASEUI-171
    Signed-off-by: guochuyicmri <guochuyi@chinamobile.com>
    
1 file changed