Update git submodules

Update git submodules

* Update docs/submodules/appc.git from branch 'master'
  to 8e48849b7d9e08945167b550c0f3e8cc6908c191
  - Added unit test cases for Worker class

    Increased coverage from 0% to 100%

    Issue-ID: APPC-1402
    Change-Id: I2a0a05a29cce79004581f21fd56138485b631f78
    Signed-off-by: Lathishbabu Ganesan <lathishbabu.ganesan@ericsson.com>
  - Added test coverage aaiinterfaceruleshandler

    Increase from 31% to 87%

    Issue-ID: APPC-1366
    Change-Id: Ib9d643c128e3dd76f658577fd8d25763e8d8dd25
    Signed-off-by: Lathishbabu Ganesan <lathishbabu.ganesan@ericsson.com>