Update git submodules

Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 924616740bdf5f596bd6f32dac32c1a8e5504650
  - Fix failing powermock tests

    The version of javassist coming from opendaylight is not working correctly
    with powermock. Adding a test scoped dependency for a working version of
    javassist.

    Test classes added in this commit are not new, they were temporarily
    removed as part of https://gerrit.onap.org/r/#/c/79046/

    Change-Id: I193873c0d4abd7b11592a95bff9a6b07cf2d7191
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1277