Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 8cecdb593c5763c14ec42634d690efc170cac97e
  - Modified code to avoid Null pointer exc
    
    Sonar fix
    
    Issue-ID: APPC-1547
    Change-Id: Ie242256130f255a05366774516cf503c2a3d47cc
    Signed-off-by: Jegadeesh Babu <jegabab1@in.ibm.com>
    
1 file changed