Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 6d9bedf2ed048a7715f0b6927683d904db9524b1
  - Test coverage for XResponseProcessor
    
    Increased coverage from 0% to 81%
    
    Issue-ID: APPC-1436
    Change-Id: I6b9805d2e048247759861ebcd65d74507c99aeb0
    Signed-off-by: Joss Armstrong <joss.armstrong@ericsson.com>
    
1 file changed