PBB VIP provisioning update

Added handler in bridge module for virtual instance port ( #VIP ) #provisioning on a provider backbone edge bridge ( #I-BEB ). This handles the #I-SID assignment and provider instance port ( #PIP ) mapping of the VIP port. The pre-provisioned PIP ports are used on VIP activation.

#802-1AH update 9 ...
[commit d37a2922359fdde909e3e5522c41759089cb82f1]