PBB customer backbone port update - 3

Added corrections for customer backbone port ( #CBP ) logical interface in bridge module. This will manage the internal LAN ( #ILAN ) port attached to the CBP #phy. This will create ILAN port as part of CBP activation and remove the ILAN port as part of CBP de-activation on a #PBB #IB-BEB bridge.

#802-1AH update 19 ...
[commit eb8af3f7f3f8d3e49943956416b5494ccb9e05c3]