PBB virtual instance port update - 2

Modified virtual instance port ( #VIP ) activation routine in bridge module. This will re-sequence the order in which VIP logical port are made #UP / #DOWN. This also validates the associated #PIP port and attaches it to the #I-Component.

#802-1AH update 23 ...
[commit 24183700f511b45d2ef97983be60070c7da0c1c2]