Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to a016bd294a49ef80d747601935f7071aae88e9ab
  - added test case to DBServiceTest.java
    
    to increase code coverage
    
    Issue-ID: APPC-1086
    Change-Id: I202822e53c2086b5db41a8028410c07c46821d1d
    Signed-off-by: Sandeep J <sandeejh@in.ibm.com>
    
1 file changed