Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to f9bbd30915d5bc66131baacb1e2f7bdf3cdcdb8f
  - added test cases to TestStructuredPropertyHelper
    
    to increase code coverage
    
    Issue-ID: APPC-1086
    Change-Id: Ic3204a6de7c7024cfba61f3aa63716b0533f9ae9
    Signed-off-by: Sandeep J <sandeejh@in.ibm.com>
    
1 file changed