Provider bridge internal LAN update

Created #ILAN (internal LAN) between #C-VLAN and #S-VLAN components in provider edge bridge (#PEB) on bridge module. Added stacking changes for ILAN on #CNP and #PEP ports.

#802-1AD update 4 ...
[commit c4f312ecb395b1bc8cb788dccc136709068fcf20]