Provider bridge C-VLAN mapping update

Added changes in bridge module for mapping of customer VLAN ( #C-VLAN ) to service VLAN ( #S-VLAN ) on the customer edge port ( #CEP ) of a C-VLAN component in a provider edge bridge ( #PEB ).

#802-1AD update 13 ...
[commit 5dca5d56d16f5d1b5f931e5222a63c2fb4901e6b]