Bridge CoS update - 11

Added changes in ethernet module for traversing #port #level #priority #code #point ( #PCP ) #decoding configuration on provider bridges. The new changes enables to #traverse through the optimized configuration entries. The #agent #framework uses these for #GETNEXT functionality among the configuration entries.

#Ethernet update 86 ...
[commit 4e61fd0cd564328a3fbdaa7dfd0fc02f9d5a11af]