Update git submodules

Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 830828d1ebb01bba58a3e997b4c2418a214cdfe9
  - Add coverage for untested DBHelper class

    Added tests and provided coverage of 95%

    Issue-ID: APPC-1394
    Change-Id: Id63e78a72fe49d3a36af786192dc2359f3d3e334
    Signed-off-by: Joss Armstrong <joss.armstrong@ericsson.com>
  - Test coverage for DBConnectionPool

    Increased class coverage to 100%

    Issue-ID: APPC-1394
    Change-Id: I7c8adb081b7342a5a18d3a2ca0238625317c6b4d
    Signed-off-by: Joss Armstrong <joss.armstrong@ericsson.com>
  - Increase coverage in AppcDatabaseConnectionPool

    Add test cases and increase coverage to 94%

    Issue-ID: APPC-1394
    Change-Id: I7ec2b0cb4fe5a22ebd8020eb7f5636075e1c5ac5
    Signed-off-by: Joss Armstrong <joss.armstrong@ericsson.com>