Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 88431b3f8e57971087c96130bb82ff384a6d9b1e
  - added file to test DispatchingFuntionMetricImpl
    
    to increase code coverage
    
    Issue-ID: APPC-1086
    Change-Id: I179c0d74f9ed14a34a02bb9eb0f31c51ca3f415c
    Signed-off-by: Sandeep J <sandeejh@in.ibm.com>
    
1 file changed