Update git submodules

Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to fc942d29a74a843ccf1cd202091e6d9704bbed29
  - Fix eelf resource not found

    The eelf package needs to be exported from appc-common
    where the resource bundle is added. Doing this was
    causing karaf to crash on install of artifact-handler.
    The cause was all of the classes being exported by the
    maven shade plugin of appc-yang-generator. Removing the
    shade plugin seemed to have no bad consequences.

    Change-Id: Ic0758b342b8109e28ec8e11a48b2693cea7b56db
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1713