Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to e037dcd6ad404acb2df5da6f5b20f8f81f8e5c13
  - added test case to TestDGGeneralDBService.java
    
    to increase code coverage
    
    Issue-ID: APPC-1086
    Change-Id: I5c88e11546158129ff0e97ced38ebd23635535e2
    Signed-off-by: Sandeep J <sandeejh@in.ibm.com>
    
1 file changed